# Ottoman architecture

Ottoman architecture is an architectural style or tradition that developed under the Ottoman Empire over a long period, undergoing some significant changes during its history. It first emerged in northwestern Anatolia in the late 13th century and developed from earlier Seljuk Turkish architecture, with influences from Byzantine and Iranian architecture along with other architectural traditions in the Middle East. Early Ottoman architecture experimented with multiple building types over the course of the 13th to 15th centuries, progressively evolving into the classical Ottoman style of the 16th and 17th centuries. This style was a mixture of native Turkish tradition and influences from the Hagia Sophia, resulting in monumental mosque buildings focused around a high central dome with a varying number of semi-domes. The most important architect of the classical period is Mimar Sinan, whose major works include the Şehzade Mosque, Süleymaniye Mosque, and Selimiye Mosque. The second half of the 16th century also saw the apogee of certain Ottoman decorative arts, most notably in the use of Iznik tiles.
Beginning in the 18th century, Ottoman architecture was opened to external influences, particularly Baroque architecture in Western Europe. Changes appeared during the style of the Tulip Period, followed by the emergence of the Ottoman Baroque style in the 1740s. The Nuruosmaniye Mosque is one of the most important examples of this period. The architecture of the 19th century saw more influences imported from Western Europe, brought in by architects such as those from the Balyan family. Empire style and Neoclassical motifs were introduced and a trend towards eclecticism was evident in many types of buildings, such as the Dolmabaçe Palace. The last decades of the Ottoman Empire saw the development of a new architectural style called neo-Ottoman or Ottoman revivalism, also known as the First National Architectural Movement, by architects such as Mimar Kemaleddin and Vedat Tek.
Ottoman dynastic patronage was concentrated in the historic capitals of Bursa, Edirne, and Istanbul (Constantinople), as well as in several other important administrative centers such as Amasya and Manisa. It was in these centers that most important developments in Ottoman architecture occurred and that the most monumental Ottoman architecture can be found. Major religious monuments were typically architectural complexes, known as a külliye, that had multiple components providing different services or amenities. In addition to a mosque, these could include a madrasa, a hammam, an imaret, a sebil, a market, a caravanserai, a primary school, or others. Ottoman constructions were still abundant in Anatolia and in the Balkans (Rumelia), but in the more distant Middle Eastern and North African provinces older Islamic architectural styles continued to hold strong influence and were sometimes blended with Ottoman styles.

## Early Ottoman period (14th to 15th centuries)
### Before 1453

The first Ottomans were established in northwest Anatolia near the borders of the Byzantine Empire. Their position at this frontier encouraged influences from Byzantine architecture and other ancient remains, and there are examples of architectural experimentation under many local Turkish dynasties in the region during this period. One of the early Ottoman stylistic distinctions that emerged was a tradition of designing more complete façades in front of mosques, especially in the form of a portico with arches and columns. Another early distinction was the reliance on domes. The first Ottoman structures were built in Söğüt, the earliest Ottoman capital, and in nearby Bilecik, but they have not survived in their original form. They include a couple of small mosques and a mausoleum built in Ertuğrul's time (late 13th century). Bursa was captured in 1326 by the Ottoman leader Orhan. It served as the Ottoman capital until 1402, becoming a major center of patronage and construction. Orhan also captured İznik in 1331, turning it into another early center of Ottoman art. In this early period there were generally three types of mosques: the single-domed mosque, the T-plan mosque, and the multi-unit or multi-dome mosque.
The Hacı Özbek Mosque (1333) in İznik is the oldest Ottoman mosque with an inscription that documents its construction and it is the oldest example of the Ottoman single-domed mosque, consisting of a square chamber covered by a dome. Another early single-domed mosque is the Green Mosque in İznik (1378–1391), which is the first Ottoman mosque for which the name of the architect (Hacı bin Musa) is known. The main dome covers a square space and the transition between the round base of the dome and the square chamber below is achieved through a series of triangular carvings known as "Turkish triangles", a type of pendentive which was common in Anatolian Seljuk and early Ottoman architecture.
In 1334–1335, Orhan built a mosque in İznik that no longer stands but has been excavated by archeologists. It is significant as the earliest known example of a type of building called a zaviye (from Arabic zawiya), "T-plan" mosque, or "Bursa-type" mosque. This type of building is characterized by a central court, typically covered by a dome, with iwans (domed or vaulted halls that are open to the courtyard) on three sides, one of which is oriented towards the qibla (direction of prayer) and contains the mihrab (wall niche symbolizing the qibla). The front façade usually incorporated a portico along its entire width. The iwans on the side and the other various rooms attached to these buildings may have served to house Sufi students and traveling dervishes, since the Sufi brotherhoods were one of the main supporters of the early Ottomans. Variations of this floor plan were the most common type of major religious structure sponsored by the early Ottoman elites. The "Bursa-type" label comes from the fact that multiple examples of this kind were built in and around Bursa, including the Orhan Gazi Mosque (1339), the Hüdavendigar (Murad I) Mosque (1366–1385), the Yildirim Bayezid I Mosque (completed in 1395), and the Green Mosque built by Mehmed I (1412–1424). The Green Mosque is notable for its extensive tile decoration in the cuerda seca technique. It is the first instance of lavish tile decoration in Ottoman architecture. These mosques were all part of larger religious complexes (külliyes) that included other structures offering services such as madrasas (Islamic colleges), hammams (public bathhouses), and imarets (charitable kitchens).
The most unusual mosque of this period is the multi-domed congregational mosque known as the Grand Mosque of Bursa or Ulu Cami. The mosque was commissioned by Bayezid I after the Battle of Nicopolis in 1396 and finished in 1399–1400. It consists of a large hypostyle hall divided into twenty equal bays in a rectangular four-by-five grid, each covered by a dome supported by stone piers. After Bayezid I was defeated at the Battle of Ankara in 1402, the Ottoman capital was moved to Edirne in Thrace. The last major multi-dome mosque built by the Ottomans (with some exceptions), is the Old Mosque (Eski Cami) in Edirne, built between 1403 and 1414. In later periods, the multi-dome building type was adapted for use in non-religious buildings instead, such as bedestens (market halls).
The reign of Murad II (r. 1421–1451) marked an important architectural development in the form of the Üç Şerefeli Mosque, built in Edirne from 1437 to 1447. It has a very different design from earlier mosques, with a nearly square floor plan divided between a rectangular courtyard and a rectangular prayer hall. The open-air courtyard has a central fountain and is surrounded by a portico of arches and domes, with a decorated central portal leading into the courtyard from the outside and another one leading from the courtyard into the prayer hall. The prayer hall is centered around a huge dome which covers most of the middle part of the hall, while the sides of the hall are covered by pairs of smaller domes. The central dome is larger than any other Ottoman dome built before this. The mosque has a total of four minarets, arranged around the four corners of the courtyard. Its southwestern minaret was the tallest Ottoman minaret built up to that time and features three balconies (from which the mosque's name derives). This new design was a culmination of previous architectural experimentation and foreshadowed the features of later Ottoman mosque architecture.

### After 1453

After he conquered Constantinople (present-day Istanbul) in 1453, one of Sultan Mehmed II's first constructions in the city was a palace, known as the Old Palace (Eski Saray). In 1459, he began construction of a second palace known as the New Palace (Yeni Saray) and later as the Topkapı Palace ("Cannon-Gate Palace"). It was mostly laid out between 1459 and 1465, but it has since been repeatedly modified over subsequent centuries by different rulers and today it is an accumulation of different styles and periods. The palace consists of multiple courtyards, enclosures, and pavilions spread across a precinct delimited by an outer wall. Its seemingly irregular layout was a reflection of a clear hierarchical organization of functions and private residences, with the innermost areas reserved for the privacy of the sultan and his innermost circle.
Mehmed II's largest contribution to religious architecture was the Fatih Mosque complex in Istanbul, built from 1463 to 1470. It was part of a very large külliye which also included a tabhane (guesthouse for travelers), an imaret, a darüşşifa (hospital), a caravanserai (hostel for traveling merchants), a mektep (primary school), a library, a hammam, shops, a cemetery with the founder's mausoleum, and eight madrasas along with their annexes. The buildings largely ignored any existing topography and were arranged in a strongly symmetrical layout on a vast square terrace with the monumental mosque at its center. The original mosque was mostly destroyed by an earthquake in 1766. Its design has been reconstructed by scholars using historical sources. It likely reflected the combination of the Byzantine church tradition (especially the Hagia Sophia) with the Ottoman tradition that had evolved since the early imperial mosques of Bursa and Edirne. Drawing on the ideas established by the earlier Üç Şerefeli Mosque, it comprised a rectangular courtyard leading to a domed prayer hall. The latter was covered by a large central dome with a semi-dome behind it (on the qibla side), flanked by a row of three smaller domes on either side.
After Mehmed II, the reign of Bayezid II (1481–1512) is again marked by extensive architectural patronage, of which the two most outstanding and influential examples are the Bayezid II Complex in Edirne and the Bayezid II Mosque in Istanbul. The Bayezid II Mosque in Istanbul, built between 1500 and 1505, again features a courtyard leading to a square prayer hall. However, its prayer hall makes use of two semi-domes aligned with the main central dome, while the side aisles are each covered by four smaller domes. Compared to earlier mosques, this results in a much more sophisticated "cascade of domes" effect for the building's exterior profile. This design, with its deliberate arrangement of established Ottoman architectural elements into a strongly symmetrical plan, is another culmination of previous architectural exploration and represents the last step towards the classical Ottoman style.

## Classical period (16th to 17th centuries)

The start of the classical period is strongly associated with the works of the imperial architect Mimar Sinan. During this period the bureaucracy of the Ottoman state, whose foundations were laid in Istanbul by Mehmet II, became increasingly elaborate and the profession of the architect became further institutionalized. The long reign of Suleiman the Magnificent is also recognized as the apogee of Ottoman political and cultural development, with extensive patronage in art and architecture by the sultan, his family, and his high-ranking officials. In this period, Ottoman architecture, especially under the work and influence of Sinan, saw a new unification and harmonization of the various architectural elements and influences that it had previously absorbed but which had not yet been fully synthesized into a collective whole. Ottoman architecture used a limited set of general forms – such as domes, semi-domes, and arcaded porticos – which were repeated in every structure and could be combined in a limited number of ways. The ingenuity of successful architects such as Sinan lay in the careful and calculated attempts to solve problems of space, proportion, and harmony. This period is also notable for the development of Iznik tile decoration in Ottoman monuments, with the artistic peak of this medium beginning in the second half of the 16th century.

### The era of Sinan

The master architect of the classical period, Mimar Sinan, served as the chief court architect (mimarbaşi) for some 50 years from 1538 until his death in 1588. Sinan credited himself with the design of over 300 buildings, though another estimate of his works puts it at nearly 500. He is credited with designing buildings as far as Buda (present-day Budapest) and Mecca. He was probably not present to directly supervise projects far from the capital, so in these cases his designs were most likely executed by his assistants or by local architects.
Sinan's first major imperial commission was the Şehzade Mosque complex, which Suleiman dedicated to Şehzade Mehmed, his son who died in 1543. The complex was built between 1545 and 1548. The mosque has a rectangular floor plan divided into two equal squares, with one square occupied by the courtyard and the other occupied by the prayer hall. The prayer hall consists of a central dome surrounded by semi-domes on four sides, with smaller domes occupying the corners. Smaller semi-domes also fill the space between the corner domes and the main semi-domes. This design represents the culmination of the previous domed and semi-domed buildings in Ottoman architecture, bringing complete symmetry to the dome layout. Sinan's early innovations are also evident in the way he organized the structural supports of the dome. Instead of having the dome rest on thick walls all around it (as was previously common), he concentrated the load-bearing supports into a limited number of buttresses along the outer walls of the mosque and in four pillars inside the mosque itself at the corners of the dome. This allowed for the walls in between the buttresses to be thinner and able to accommodate more windows to bring in more light. Sinan also moved the outer walls inward, near the inner edge of the buttresses, so that the latter were less visible inside the mosque. On the outside, he added domed porticos along the lateral façades of the building which further obscured the buttresses and gave the exterior a greater sense of monumentality.
The basic design of the Şehzade Mosque, with its symmetrical dome and four semi-dome layout, proved popular with later architects and was repeated in classical Ottoman mosques after Sinan (e.g. the Sultan Ahmed I Mosque, the New Mosque at Eminönü, and the 18th-century reconstruction of the Fatih Mosque). Despite this legacy and the symmetry of its design, Sinan considered the Sehzade Mosque his "apprentice" work and was not satisfied with it. He did not repeat its layout in any of his other works during his career. He instead experimented with other designs that seemed to aim for a completely unified interior space and for ways to emphasize the visitor's perception of the main dome upon entering a mosque. One of the results of this objective was that any space that did not belong to the central domed space was reduced to a minimum, subordinate role, if not altogether absent.
In 1550, Sinan began construction for the Süleymaniye complex, a monumental religious and charitable complex dedicated to Suleiman. Construction finished in 1557. Following the example of the earlier Fatih complex, it consists of many buildings arranged around the main mosque in the center, on a planned site occupying the summit of a hill in Istanbul. The Süleymaniye Mosque complex is one of the most important symbols of Ottoman architecture and is often considered by scholars to be the most magnificent mosque in Istanbul. The mosque itself has a form similar to that of the earlier Bayezid II Mosque: a central dome preceded and followed by semi-domes, with smaller domes covering the sides. In particular, the building replicates the central dome layout of the Hagia Sophia and this may be interpreted as a desire by Suleiman to emulate the structure of the Hagia Sophia, demonstrating how this ancient monument continued to hold tremendous symbolic power in Ottoman culture. Nonetheless, Sinan employed innovations similar to those he used previously in the Şehzade Mosque: he concentrated the load-bearing supports into a limited number of columns and pillars, which allowed for more windows in the walls and minimized the physical separations within of the prayer hall. The exterior façades of the mosque are characterized by ground-level porticos, two large tympanum-like walls below the dome that are pierced by an array of windows, and domes and semi-domes that progressively culminate upwards – in a roughly pyramidal fashion – to the large central dome.
After designing the Süleymaniye complex, Sinan appears to have focused on experimenting with the single-domed space. In the 1550s and 1560s, he experimented with an "octagonal baldaquin" design for the main dome, in which the dome rests on an octagonal drum supported by a system of eight pillars or buttresses. An example of this is the Rüstem Pasha Mosque (1561) in Istanbul. This mosque is also famous for its wide array of Iznik tiles covering the walls of its exterior portico and its interior, unprecedented in Ottoman architecture, contrasting with the usually restrained decoration Sinan employed in other buildings.
Sinan's crowning masterpiece is the Selimiye Mosque in Edirne, which was begun in 1568 and completed in 1574 (or possibly 1575). Its prayer hall is notable for being completely dominated by a single massive dome, whose view is unimpeded by the structural elements seen in other large domed mosques before this. This design is the culmination of Sinan's spatial experiments, making use of the octagonal baldaquin as the most effective method of integrating the round dome with the rectangular hall below by minimizing the space occupied by the supporting elements of the dome. The dome is supported on eight massive pillars which are partly freestanding but closely integrated with the outer walls. Additional outer buttresses are concealed in the walls of the mosque, allowing the walls in between to be pierced with a large number of windows. Sinan's biographies praise the dome for its size and height, which is approximately the same diameter as the Hagia Sophia's main dome; the first time that this had been achieved in Ottoman architecture.

### After Sinan

After Sinan, the classical style became less creative and more repetitive by comparison with earlier periods. Davud Agha succeeded Sinan as chief architect. Among his most notable works, all in Istanbul, are the Cerrahpaşa Mosque (1593), the Koca Sinan Pasha Complex on Divanyolu (1593), the Gazanfer Ağa Medrese complex (1596), and the Tomb of Murad III (completed in 1599). Some scholars argue that the Nışançı Mehmed Pasha Mosque (1584–1589), whose architect is unknown, should be attributed to him. Its design is considered highly accomplished and it may be one of the first Ottoman mosques to be fronted by a garden courtyard.
The Sultan Ahmed I Mosque, begun in 1609 and completed in 1617, was designed by Sinan's apprentice, Mehmed Agha. The mosque's size, location, and decoration suggest it was intended to be a rival to the nearby Hagia Sophia. Its design essentially repeats that of the Şehzade Mosque. On the outside, Mehmed Agha opted to achieve a "softer" profile with the cascade of domes and the various curving elements, differing from the more dramatic juxtaposition of domes and vertical elements seen in earlier classical mosques by Sinan. It is also the only Ottoman mosque to have as many as six minarets. On the inside, the mosque's lower walls are lavishly decorated with thousands of predominantly blue Iznik tiles; along with the painted decoration on the rest of the walls, this has given the mosque its popular name, the Blue Mosque. After the Sultan Ahmed I Mosque, no further great imperial mosques dedicated to a sultan were built in Istanbul until the mid-18th century. Mosques continued to be built and dedicated to other dynastic family members, but the tradition of sultans building their own monumental mosques lapsed.
Some of the best examples of early 17th-century Ottoman architecture are also to be found in Topkapı Palace, at the Revan Kiosk (1635) and Baghdad Kiosk (1639), built by Murad IV to commemorate his victories against the Safavids. Both are small pavilions raised on platforms overlooking the palace gardens. Both are harmoniously decorated on the inside and outside with predominantly blue and white tiles and richly-inlaid window shutters.

## Tulip Period (early 18th century)

The historical period known as the Tulip Period or Tulip Era is considered to have begun in 1718, during Ahmed III's reign (r. 1703–1730), and lasted until the Patrona Halil revolts of 1730, when Ahmed III was overthrown. These years of peace inaugurated a new era of growing cross-cultural exchange between the Ottoman Empire and Western Europe. From the 18th century onward, European influences were thus introduced into Ottoman architecture as the Ottoman Empire itself became more open to outside influences. The period saw significant influence from the French Rococo style (part of the wider Baroque style) that emerged around this time under the reign of Louis XV. In addition to European influences, the decoration of the Tulip Period was also influenced by Safavid art and architecture to the east. Although the new architectural style that emerged at this time is generally associated with the Tulip Period, constructions from the first years of Ahmed III's reign, such as the so-called Fruit Room created in 1705 within Topkapı Palace, demonstrate that the new style was already in existence by then.
One of the most important creations of the Tulip Period was the Sadâbâd Palace, a new summer palace designed and built by Damat Ibrahim Pasha in 1722–1723 for Ahmed III. It was located at Kâğıthane, a rural area on the outskirts of the city with small rivers that flow into the Golden Horn inlet. The palace grounds included a long marble-lined canal, the Cedval-i Sim, around which were gardens, pavilions, and palace apartments in a landscaped setting. This overall design probably emulated French pleasure palaces as a result of the reports about Paris and Versailles brought back by Ottoman ambassador Yirmisekiz Çelebi Mehmed Efendi. The regular inhabitants of Istanbul also used the surrounding area as a recreational ground for excursions and picnics. This was a new practice in Ottoman culture that brought the public within close proximity of the ruler's abode for the first time.
The culmination of the Tulip Period style is represented by a series of monumental stand-alone fountains that were mostly built between 1728 and 1732. Water took on an enlarged role in architecture and the urban landscape of Istanbul during the Tulip Period. In the first half of the 18th century, Istanbul's water supply infrastructure was renovated and expanded. In 1732, an important water distribution structure, the taksim, was first built on what is now Taksim Square. The new fountains were unprecedented in Ottoman architecture. Previously, fountains and sebils only existed as minor elements of larger charitable complexes or as shadirvans inside mosque courtyards. The maidan fountain, or a stand-alone fountain at the center of a city square, was introduced for the first time in this period. The first and most remarkable of these is the Ahmed III Fountain built in 1728 next to the Hagia Sophia and in front of the outer gate of Topkapı Palace.
The construction of stand-alone library structures was another new trend influenced by European ideas, as the Ottomans traditionally did not build libraries except as secondary elements attached to religious complexes. The earlier Köprülü Library, built in 1678 was the first of its kind, but other early examples date from the reign of Ahmed III during the Tulip Period.
One of the few major religious complexes built in this period and one of the last major monuments of the Tulip Period stage in Ottoman architecture is the Hekimoğlu Ali Pasha Mosque complex, completed in 1734–1735 and sponsored by the grand vizier of the same name. This mosque still reflects an overall classical form but the flexible placement of the various components of the complex around a garden enclosure is more reflective of the new changes in tastes. The interior of the mosque is decorated with tiles from the Tekfursaray kilns, which were of lesser quality than those of the earlier Iznik period. One group of tiles is painted with an illustration of the Great Mosque of Mecca, a decorative detail found in other examples from this era.

## Baroque period (18th century to early 19th century)

During the 1740s a new Ottoman or Turkish "Baroque" style emerged in its full expression and rapidly replaced the style of the Tulip Period. This shift signaled the final end to the classical style. The political and cultural conditions which led to the Ottoman Baroque trace their origins in part to the Tulip Period, when the Ottoman ruling class opened itself to Western influence. After the Tulip Period, Ottoman architecture openly imitated European architecture, so that architectural and decorative trends in Europe were often mirrored in the Ottoman Empire at the same time or after a short delay. Changes were especially evident in the ornamentation and details of new buildings rather than in their overall forms, though new building types were eventually introduced from European influences as well. The term "Turkish Rococo", or simply "Rococo", is also used to describe the Ottoman Baroque, or parts of it, due to the similarities and influences from the French Rococo style in particular, but this terminology varies from author to author.
The first structures to exhibit the new Baroque style are several fountains and sebils built by elite patrons in Istanbul in 1741–1742. The most important monument heralding the new Ottoman Baroque style is the Nuruosmaniye Mosque complex, begun by Mahmud I in October 1748 and completed by his successor, Osman III (to whom it is dedicated), in December 1755. Doğan Kuban describes it as the "most important monumental construction after the Selimiye Mosque in Edirne", marking the integration of European culture into Ottoman architecture and the rejection of the classical Ottoman style. It also marked the first time since the Sultan Ahmed I Mosque (early 17th century) that an Ottoman sultan built his own imperial mosque complex in Istanbul, thus inaugurating the return of this tradition.
The Ayazma Mosque in Üsküdar was built between 1757–58 and 1760–61. It is essentially a smaller version of the Nuruosmaniye Mosque, signaling the importance of the latter as a new model to emulate. Although smaller, it is relatively tall for its proportions, enhancing its sense of height. This trend towards height was pursued in later mosques.
In Topkapı Palace, the Ottoman sultans and their family continued to build new rooms or remodel old ones throughout the 18th century, introducing Baroque and Rococo decoration in the process. Some examples include the Baths of the Harem section, probably renovated by Mahmud I around 1744, As in the preceding centuries, other palaces were built around Istanbul by the sultan and his family. Previously, the traditional Ottoman palace configuration consisted of different buildings or pavilions arranged in a group, as was the case at Topkapı Palace, the Edirne Palace, and others. However, at some time during the 18th century there was a transition to palaces consisting of a single block or single large building.
Beyond Istanbul, the greatest palaces were built by powerful local families, but they were often built in regional styles that did not follow the trends of the Ottoman capital. The Azm Palace in Damascus, for example, was built around 1750 in a largely Damascene style. In eastern Anatolia, near present-day Doğubayazıt, the Ishak Pasha Palace is an exceptional and flamboyant piece of architecture that mixes various local traditions including Seljuk Turkish, Armenian, and Georgian. It was begun in the 17th century and generally completed by 1784.
The Nusretiye Mosque, Mahmud II's imperial mosque, was built between 1822 and 1826 at Tophane. The mosque is the first major imperial work by Krikor Balyan. It is sometimes described as belonging to the Empire style, but is considered by Godfrey Goodwin and Doğan Kuban as one of the last Baroque mosques, while Ünver Rüstem describes the style as moving away from the Baroque and towards an Ottoman interpretation of Neoclassicism. Goodwin also describes it as the last in a line of imperial mosques that started with the Nuruosmaniye. Despite its relatively small size the mosque's tall proportions creates a sense of height, which may the culmination of a trend that began with the Ayazma Mosque.

## 19th-century and early 20th-century

During the reign of Mahmud II (r. 1808–1839) the Empire style, a Neoclassical style which originated in France under Napoleon, was introduced into Ottoman architecture. This marked a trend towards increasingly direct imitation of Western styles, particularly from France. The Tanzimat reforms that began in 1839 under Abdülmecid I sought to modernize the Ottoman Empire with Western-style reforms. In the architectural realm, this resulted in the dominance of European architects and Ottoman architects with European training. Among these, the Balyans, an Ottoman Armenian family, succeeded in dominating imperial architecture for much of the century. They were joined by European architects such as the Fossati brothers, William James Smith, and Alexandre Vallaury. After the early 19th century, Ottoman architecture was characterized by an eclectic architecture which mixed or borrowed from multiple styles. The Balyans, for example, commonly combined Neoclassical or Beaux-arts architecture with highly eclectic decoration. As more Europeans arrived in Istanbul, the neighbourhoods of Galata and Beyoğlu (or Pera) took on very European appearances.
A number of mosques built in the 19th century reflect these trends, such as the Ortaköy Mosque and the Pertevniyal Valide Mosque in Istanbul. The Tanzimat reforms also granted Christians and Jews the right to freely build new centers of worship, which resulted in new constructions, renovations, and expansions of churches and synagogues. Most of these followed the same eclecticism that prevailed in the rest of Ottoman architecture of the 19th century.
Many palaces, residences, and leisure pavilions were built in the 19th century, most of them in the Bosphorus suburbs of Istanbul. The most significant is the Dolmabahçe Palace, constructed for Sultan Abdülmecit between 1843 and 1856. It replaced the Topkapı Palace as the official imperial residence of the sultan. The palace consists mainly of a single building with monumental proportions, which represented a radical rejection of traditional Ottoman palace design. The style of the palace is fundamentally Neoclassical but is characterized by a highly eclectic decoration that mixes Baroque motifs with other styles.
Various new types of monuments were also introduced to Ottoman architecture during this era. For example, clock towers rose to prominence over the 19th century. The construction of railway stations was a feature of Ottoman modernisation reflecting the new infrastructure changes within the empire. The most famous example is the Sirkeci Railway Station, built in 1888–1890 as the terminus of the Orient Express. It was designed in an Orientalist style by German architect August Jasmund (also spelled "Jachmund"). In the Beyoğlu district of Istanbul, Parisian-style shopping arcades appeared in the 19th century. Some consisted of a small courtyard filled with shops and surrounded by buildings, while others were simply a passage or alley (pasaj in Turkish) lined with shops, sometimes covered by a glass roof. Other commercial building types that appeared in the late 19th century included hotels and banks.
A local interpretation of Orientalist fashion steadily arose in the late 19th century, initially used by European architects such as Vallaury. This trend combined "neo-Ottoman" motifs with other motifs from wider Islamic architecture. The eclecticism and European imports of the 19th century eventually led to the introduction of Art Nouveau, especially after the arrival of Raimondo D'Aronco in the late 19th century. D'Aronco came at the invitation of Sultan Abdülhamid II and served as chief court architect between 1896 and 1909. Istanbul became a new center of Art Nouveau and a local flavour of the style developed. The new style was most prevalent in the new apartment buildings being built in Istanbul at the time.
The final period of architecture in the Ottoman Empire developed after 1900 and in particular after the Young Turks took power in 1908–1909, in what was then called the "National Architectural Renaissance" and since referred to as the First national architectural movement of Turkish architecture. The approach in this period was an Ottoman Revival style, a reaction to influences in the previous 200 years that had come to be considered "foreign", such as Baroque and Neoclassical architecture, and was intended to promote Ottoman patriotism and self-identity. This was related to earlier Ottoman architecture in rather the same manner as other roughly contemporaneous revivalist architectures related to their stylistic inspirations. New government-run institutions that trained architects and engineers, established in the late 19th century and further centralized under the Young Turks, became instrumental in disseminating this "national style".

## Domes

The dome was a paramount feature of Ottoman architecture for most of its history. In religious architecture, the dome and the integration of the interior with the central domed space could be a symbol for the "oneness of God" (tawhid). Especially after Sinan, the design of monumental Ottoman buildings was conceptualized with the central dome above as its starting point, rather than the floor plan being conceived first and the roofing system after. Under Sinan, the core of the design was more specifically the domed baldaquin, which is to say the dome and its basic structural support system: a set of pillars or buttresses in a square, hexagonal, or octagonal configuration – involving four, six, or eight pillars, respectively. Thanks to the influence of the Hagia Sophia and early Ottoman mosque designs, the central dome was often accompanied with semi-domes and the transition from the base of the dome to the space below was typically accomplished through pendentives. The focus on the central dome also led Ottoman architects to emphasize verticality in their designs.
The dome itself remained geometrically simple in Ottoman architecture. While many different types of domes had previously developed in Islamic architecture and while contemporary European architecture experimented with ostentatious dome constructions, Ottoman architects consistently used simple hemispheric domes. Sinan knew of double-shelled domes, which were used in earlier Islamic architecture, and he employed them in the Mausoleum of Suleiman and in multiple other mausoleums. Nonetheless, they were not the norm and the Ottomans more regularly used single-shelled domes in almost every context. For example, the huge dome of Sinan's masterpiece, the Selimiye Mosque in Edirne, is a single-shelled construction. When double-shelled domes were used, the outer and inner shells had the same shape, thus maintaining the same profile on the outside as on the inside. Ottoman domes were not raised on prominent drums, unlike their Byzantine predecessors, but their outer edge usually rested on a circle of alternating buttresses and windows.
Since the early Ottoman period, domes were usually built with brick, a relatively light material that was thus convenient for this purpose. This remained the usual practice even after stone replaced brick as the main material for walls after the early period. Wood was used for the centring during construction. On the outside, early domes were commonly covered with terracotta tiles but by the 16th century they were generally covered with lead.

## Decoration
### Tile decoration

Glazed tile decoration in the cuerda seca technique was used in early Ottoman monuments. The most extensive example is the Green Mosque and the associated Green Tomb in Bursa (early 15th century). The tiles of the Green Mosque complex generally have a deep green ground mixed with combinations of blue, white, and yellow forming arabesque motifs. A large portion of the tiles are cut into hexagonal and triangular shapes that were then fitted together to form murals. Some of the tiles are further enhanced with arabesque motifs applied in gilt gold glazing over the other colours. The artistic style of these tiles – and of other early Ottoman art – was influenced by an "International Timurid" taste that emerged from the intense artistic patronage of the Timurids, who controlled a large empire across the Middle East and Central Asia.
The same kind of tilework is found in the mihrab of the Murad II Mosque in Edirne, completed in 1435, along with the first examples of a new technique with underglaze blue on a white background, with touches of turquoise. The motifs on these tiles include lotuses and camellia-like flowers on spiral stems. These chinoiserie-like motifs, along with the focus on blue and white colours, most likely reflect an influence from contemporary Chinese porcelain – although the evidence for Chinese porcelain reaching Edirne at this time is unclear.
Another stage in Ottoman tiles is evident in the surviving tiles of the Fatih Mosque (1463–70) and in the Selim I Mosque (1520–22). In these mosques the windows are topped by lunettes filled with cuerda seca tiles with motifs in green, turquoise, cobalt blue, and yellow. Chinese motifs such as dragons and clouds also appear for the first time on similar tiles in Selim I's tomb, built behind his mosque in 1523. A more extravagant example of this type of tilework can be found inside the tomb of Şehzade Mehmed in the cemetery of the Şehzade Mosque (1548).
In the late 15th century, in the 1470s or 1480s, the ceramic industry in the city of İznik was growing and began producing a new "blue-and-white" fritware which adapted and incorporated Chinese motifs in its decoration. The most extraordinary tile panels from this stage of Ottoman ceramic art are a series of panels on the exterior of Circumcision Pavilion (Sünnet Odası) in Topkapı Palace. At least some of these tiles are believed to date from the 1520s and feature large floral motifs in blue, white, and turquoise. They exemplify the advent of the saz style: a motif in which a variety of flowers are attached to gracefully curving stems with serrated leaves, appearing in the 16th century. This continued to reflect earlier influences of the "International Timurid" style, but it also demonstrates the development of an increasingly distinct Ottoman artistic style at this time.
The architect Mimar Sinan generally used tile decoration in a fairly restrained manner and seems to have preferred focusing on the architecture as a whole rather than on overwhelming decoration. An exception to this austerity is the extensive tilework in the Rüstem Pasha Mosque (1561–62), which also marks the beginning of the artistic peak of Iznik ceramic art from the 1560s onward. Blue colours predominate, but the important "tomato red" colour began to make an appearance. The repertoire of motifs includes tulips, hyacinths, carnations, roses, pomegranates, artichoke leaves, narcissus, and Chinese "cloud" motifs.
In the early 17th century, some features of 16th-century Iznik art began to fade, such as the use of embossed tomato red. At the same time, some motifs became more rigidly geometric and stylized. Production was pushed to the limit for the enormous Sultan Ahmed Mosque (or "Blue Mosque"), begun in 1609 and inaugurated in 1617, which contains the richest collection of tilework of any Ottoman mosque. According to official Ottoman documents it contained as many as 20,000 tiles. While the craftsmen at Iznik were still capable of producing rich and colourful tiles throughout the 17th century, there was an overall decline in quality, caused in part by the devastation of the Celali revolts and by an overall decline in commissions. Some of the production continued in the city of Kütahya instead of Iznik. Tile manufacture declined still further in the second half of the century. By this period, blue and turquoise colours increasingly predominated, and many commissioned works limited their patterns to single tiles instead of creating larger patterns across multiple tiles. Tile production in Iznik came to an end in the 18th century.
The shortage of quality tiles in the 18th century caused Iznik tiles from older buildings to be reused and moved to new ones on multiple occasions. Ahmet III and his grand vizier attempted to revive the tile industry by establishing a new workshop between 1719 and 1724 at Tekfursaray in Istanbul. Production continued here for a while but the quality was not comparable to earlier Iznik tiles. Pottery production also continued and even increased at Kütahya, where new styles developed alongside imitations of older classical Ottoman designs. The colours of tiles in this period were mostly turquoise and dark cobalt blue, while a brownish-red, yellow, and a deep green also appearing. The background was often discoloured, colours often ran together slightly, and the patterns were typically limited to single tiles. The Tekfursaray kilns ceased to function after the Patrona Halil rebellion in 1730, which deposed Ahmet III. Ultimately, tilework decoration in Ottoman architecture lost its significance during this century.

### Painted decoration

Painted decoration was an essential part of the decoration of Ottoman buildings, covering interior walls, ceilings, and domes. However, very little original painted decoration has been preserved in Ottoman buildings, as they were frequently repainted during later restorations. Paint, as well as gold leaf, was applied on a variety of mediums including plaster, wood, leather or cloth, and stone. For plaster decoration, there were generally two types: kalemişi and malakâri. The first refers to paint being applied directly to plaster, while the second referred to applying paint onto relief decoration sculpted beforehand. The design of the ornamentation was often stenciled onto the plaster first, using paper pierced with pin holes in the shape of the motifs, over which coal dust was rubbed to leave outlines on the walls that were then painted.
The motifs of painted decoration were typically similar to those used in other contemporary arts, such as manuscript illumination. Early examples indicate that Ottoman decoration developed a preference for floriate motifs. One such motif that was popular throughout the history of Ottoman art is the rumî style, whose existence predates the Ottomans and which consists of scrolling, spiraling, and/or intertwining stems with stylized leaves. Another floriate style that appeared in Ottoman decoration from the 15th century onward is hatayî, which consists in large part of peonies and leaves shown in varying stages of budding and blooming. This style had its origins further east in China or Turkestan and it appeared in Islamic art from the 13th century onward. One of the most important examples of early Ottoman painted decoration is the partially-preserved mural decoration inside the Murad II Mosque in Edirne, which still dates back to its construction circa 1436. The ornamentation inside the southeastern (qibla) iwan depicts natural landscapes with stylized flowers and trees that appear to reflect the same artistic styles used in book illustrations and miniatures, particularly those from the Timurid Empire further east.
In the second quarter of the 16th century, the saz style (also mentioned above for tile decoration) was developed by Ottoman artist Şahkulu. It was derived from the hatayî style and added new motifs, most notably large serrated leaves. It was less formal and geometrically rigid, allowing these motifs to be combined and arranged in a wide variety of ways to fill any space.
The most monumental painted compositions were employed in and around the domes and semi-domes of Ottoman buildings. For much of the Ottoman era, domes were typically decorated with a circular medallion-like composition at the center of the dome that was filled with a calligraphic rendition of Qur'anic verses. The motif of the central medallion radiated outward to cover the rest of the dome, with the details filled by rumî, hatayî, or saz motifs. This type of dome decoration is well-known from the 16th century onward but it probably had appeared earlier in the 15th century as well.
In the later 17th century, painted decoration underwent a gradual shift in style that can be attributed to European influence. Among other trends, shading was introduced to what had previously been areas of flat colour. This was evident not only in new buildings but also in older buildings whose decoration was redone after this period. In some of the latter cases, the traditional designs were retained during restoration but they were updated to include shading. Around the same time (in the second half of the 17th century), a new style known as Edirnekārī began to appear. It primarily depicted flowers, a traditional Ottoman motif, but with an increased level of naturalism not previously seen in Ottoman art. The reign of Ahmet III (r. 1703–1730), which include the years of the Tulip Period (1718–1730), saw the popularization of a style derived from this, featuring plentiful depictions of flowers in vases and bowls of fruit, sometimes with shading. The most vivid example of this is the so-called Fruit Room, created by Ahmet III inside Topkapı Palace in 1705. This new style remained popular until the end of the century.
The advent of the Ottoman Baroque architectural style in the 1740s also brought new motifs of European origin or influence. By the end of the 18th century, European influence continued to grow and the new repertoire of motifs included garlands, ribbons, flower bouquets, and baskets of roses. Decoration could now be painted to appear three-dimensional, adding a new visual effect even when otherwise traditional motifs were used. The trompe-l'œil technique was also introduced, particularly during the reign of Abdülmecid I (r. 1839–1861). Examples from this period can be seen inside the Ortaköy Mosque (1850s) and in the Dolmabaçe Palace (1843–1856).

### Stone carving

Compared to the Anatolian Seljuk architecture that came before it, Ottoman architecture treated stone carving as a less important decorative medium. In the early Ottoman period, an exception to this paucity of traditional stone carving is the Green Mosque in Bursa, which features skilled carving of marble surfaces into vegetal arabesque and calligraphic motifs. This was generally not repeated in subsequent Ottoman monuments, with the partial exception of mihrabs.
Nonetheless, high-quality stone carving was still used to enrich the details of buildings throughout the Ottoman period, particularly for entrance portals, minaret balconies, niches, column capitals, and moldings. One of the main decorative techniques in this medium was muqarnas (or "stalactite") carving, which is used in all of these aforementioned elements. Since the Seljuk era, muqarnas semi-vaults had been a typical feature of entrance portals and mihrabs, and this tradition continued in Ottoman mosques.
In the early 18th century, around the Tulip Period, diverse new floral motifs were added to the decorative repertoire of buildings. These can be found in carved reliefs, employed most prolifically on the façades of fountains and sebils, which became common types of monuments commissioned during this century. The motifs include flowers, fruits, garlands, and rosettes, as well as designs developed from the hatayî style previously used for painted decoration. With the advent of the Ottoman Baroque in the 18th century, Ottoman stone carving borrowed motifs directly from the relief ornamentation in French Rococo architecture, including acanthus leaves, shells, baroque moldings, and mixtilinear arch forms. Although many novelties were introduced, one traditional feature that continued throughout this period were the calligraphic inscriptions placed in panels over gates, in friezes, and in other prominent locations.

## Gardens

Ottoman gardens were relatively informal and tended to accommodate natural topography, unlike gardens in many other parts of the Islamic world – such as Iran or South Asia – where a more formal design was preferred with a symmetrical four-part division or other geometric layout. Gardens could be planted with large trees for shade, smaller citrus trees, and flowerbeds. Tulips were favored for flowers, even more so in the Tulip Period during the reign of Sultan Ahmet III (r. 1703–1730).

### Palaces and leisure gardens

Exemplifying this Ottoman trend, the gardens in Topkapı Palace were laid out according to the existing topography and emphasized naturalism over geometry. Some were organized as formal gardens whereas others took the appearance of semi-natural parks, with some sections consisting of formal parterres that were then placed inside larger informal garden areas. Sultan Suleyman was a lover of gardens and employed some 2,500 gardeners to tend to roses, cypresses, and other flowering plants in the palace grounds. Ahmet III had a tulip garden planted in the Fourth Court of the palace, just outside the Circumcision Room.
One documented exception to the general trend of informal design was the Karabali Garden, laid out in the early 16th century in Kabataş (a district of Istanbul). It had four symmetrical quadrants divided by axial paths, making it an uncommon example of the chahar bagh-type garden in an Ottoman context.
Garden pavilions were a common feature of palaces and private gardens, designed to provide shelter for residents and visitors as they enjoyed views of the gardens. They are depicted in many Ottoman miniature paintings. They were often simple open kiosks with arches or columns supporting a sloped roof, but there were also more monumental tower-pavilions such as the Tower of Justice in Topkapı Palace or the Cihannüma in the Edirne Palace.
Ottoman sultans and elites built many other palaces, leisure kiosks, and estates, especially along the shores of the Bosphorus and the Sea of Marmara around Istanbul. An illustration of the Bosphorus from 1738–9 shows many walled gardens lining both of its shores. These waterside palaces often had one side overlooking the water and the other side overlooking gardens. The Topkapı-style tradition of a sprawling palace with multiple pavilions amidst gardens made a comeback in the late 19th century when Sultan Abdulhamid II (r. 1876–1909) moved his residence to the new Yıldız Palace, which is set inside a large park area on the slopes overlooking the Bosphorus.

### Mosques and cemeteries

Large Ottoman küllliye complexes, which consisted of a mosque with other charitable and religious buildings around it, were often set inside an outer enclosure. The grounds and common spaces of these enclosures were planted with grass and trees, around which the various structures were organized.
Some Ottoman mosques in Istanbul also had trees planted inside their courtyards. At the Fatih Mosque, the courtyard once contained four cypress trees planted around a central fountain, a composition likely originating from the now-vanished atrium of the Hagia Sophia, which featured the same arrangement. A late 18th-century illustration of the Süleymaniye Mosque also indicates the presence of trees in its courtyard. According to Godfrey Goodwin, the first mosque to have a courtyard filled with a garden may be either the Mesih Mehmed Pasha Mosque or the Nışançı Mehmed Pasha Mosque, both built in the same neighborhood around 1585.
In Ottoman society, cemeteries and places of burial were usually gardens. Cypress trees were a common presence in this context as well. Many Ottoman mosques were accompanied by garden-cemeteries. At the Fatih and Süleymaniye mosques, these garden-cemeteries are set behind the qibla wall of the mosque and contain the mausoleum of the sultan who founded the mosque, along with other burials. The cemeteries were planted with trees and flowers but the graves themselves may have also been imagined as miniature gardens, since they contain small plots laid out for planting and some of the tombstones even have holes to anchor vines.

## Architecture in the provinces

The main developments in Ottoman architecture generally took place in the capital cities (Bursa, Edirne, Istanbul) and other major administrative centers that were closely associated with the Ottoman dynasty, where imperial patronage was most concentrated. Beyond these imperial centers, Ottoman provincial governors and other local elites sponsored their own constructions, but the architectural style of these buildings varied depending on local context.
In Europe (Rumelia) and in western Anatolia, Ottoman constructions mostly imitated the trends of the capital, though there were still local variations and eccentricities. In the Balkans, the reign of Murad II (r. 1421–1451 with brief interruption) saw many renovations of early Ottoman buildings and also the construction of multiple new mosques and civic or religious complexes. Nearly all the other important Ottoman monuments in the European provinces beyond Istanbul and Edirne date from the 16th and 17th centuries. Building activity was particularly intense in the 16th century, even surpassing that of Anatolia, but it declined over the course of the 17th century. Sarajevo, Mostar, Skopje, Plovdiv and Thessaloniki were among the most important cities in the region and their Ottoman monuments often reflect a classical style. As in many other provincial areas of the empire, mosques in the Balkans generally consisted of the single-dome type with one minaret, though some were also built with sloped wooden roofs instead.
In other regions which had been Islamized long before the Ottomans, local Islamic architectural traditions were not easily displaced and remained highly relevant in the construction of new buildings. In Egypt and the Syrian region, the Mamluk architectural style that existed before the Ottoman conquest of 1516–1517 was largely continued while incorporating elements and ideas of Ottoman architecture to varying degrees. The regions along the edges of Anatolia, Syria, and Mesopotamia (around southeastern Turkey today) also resisted assimilation to the culture of the Ottoman capital and continued to be strongly influenced by local styles. For example, Diyarbakir, Van, and Adana were important regional centers that retained or developed their own local architectural styles. Further afield in North Africa, particularly in Ottoman Algeria and Ottoman Tunisia, which were autonomous for much of the Ottoman era, the local western Islamic style was blended with Ottoman architecture in different ways. In Baghdad, Ottoman-era mosques were built almost entirely according to local traditions.