The Pantheon ( or US;[1]Latin: Pantheon,[nb 1] from GreekΠάνθεον meaning "every god") is a building in Rome, Italy, on the site of an earlier building commissioned by Marcus Agrippa during the reign of Augustus (27 BC – 14 AD).  The present building was completed by the emperor Hadrian and probably dedicated about 126 AD.  He retained Agrippa's original inscription, which has confused its date of construction.[2]

The building is circular with a portico of large granite Corinthian columns (eight in the first rank and two groups of four behind) under a pediment.  A rectangular vestibule links the porch to the rotunda, which is under a cofferedconcretedome, with a central opening (oculus) to the sky.  Almost two thousand years after it was built, the Pantheon's dome is still the world's largest unreinforced concrete dome.[3] The height to the oculus and the diameter of the interior circle are the same, 43.3 metres (142 ft).[4]

It is one of the best-preserved of all Ancient Roman buildings.  It has been in continuous use throughout its history, and since the 7th century, the Pantheon has been used as a church dedicated to "St. Mary and the Martyrs" (Latin: Santa Maria ad Martyres) but informally known as "Santa Maria Rotonda".[5] The square in front of the Pantheon is called Piazza della Rotonda. 

Contents

Etymology1

History2

Ancient2.1

Medieval2.2

Renaissance2.3

Modern2.4

Structure3

Portico3.1

Rotunda3.2

Interior3.3

Christian modifications4

Gallery5

Works modeled on, or inspired by, the Pantheon6

See also7

Notes8

Footnotes9

References10

External links11

Etymology

Pantheon is derived from the Ancient Greek "Pantheon" (Πάνθεον) meaning "of, relating to, or common to all the gods": (Pan /"Παν" meaning "all" + Theon / "θεον"= meaning "gods").[6]Cassius Dio, a Roman senator who wrote in Greek, speculated that the name comes either from the statues of so many gods placed around this building, or from the resemblance of the dome to the heavens.[7] His uncertainty strongly suggests that "Pantheon" (or Pantheum) was merely a nickname, not the formal name of the building.[8] In fact, the concept of a pantheon dedicated to all the gods is questionable.  The only definite pantheon recorded earlier than Agrippa's was at Antioch in Syria, though it is only mentioned by a sixth-century source.[9] Ziegler tried to collect evidence of panthea, but his list consists of simple dedications "to all the gods" or "to the Twelve Gods," which are not necessarily true panthea in the sense of a temple housing a cult that literally worships all the gods.[10]

Godfrey and Hemsoll point out that ancient authors never refer to Hadrian's Pantheon with the word aedes, as they do with other temples, and the Severan inscription carved on the architrave uses simply "Pantheum," not "Aedes Panthei" (temple of all the gods).[11] It seems highly significant that Dio does not quote the simplest explanation for the name—that the Pantheon was dedicated to all the gods.[12] In fact, Livy wrote that it had been decreed that temple buildings (or perhaps temple cellae) should only be dedicated to single divinities, so that it would be clear who would be offended if, for example, the building were struck by lightning, and because it was only appropriate to offer sacrifice to a specific deity (27.25.7-10).[13] Godfrey and Hemsoll maintain that the word Pantheon "need not denote a particular group of gods, or, indeed, even all the gods, since it could well have had other meanings….  Certainly the word pantheus or pantheos, could be applicable to individual deities….  Bearing in mind also that the Greek word θειος (theios) need not mean "of a god" but could mean "superhuman," or even "excellent. "[11]

Since the French Revolution, when the church of Sainte-Geneviève in Paris was deconsecrated and turned into the secular monument called the Panthéon of Paris, the generic term pantheon has sometimes been applied to other buildings in which illustrious dead are honoured or buried.[1]

History

The Pantheon and the Fontana del Pantheon. 

Ancient

In the aftermath of the Battle of Actium (31 BC), Marcus Agrippa started an impressive building program: the Pantheon was a part of the complex created by him on his own property in the Campus Martius in 29-19 BC, which included three buildings aligned from south to north: the Baths of Agrippa, the Basilica of Neptune, and the Pantheon.[14] It seems likely that the Pantheon and the Basilica of Neptune were Agrippa's sacra privata, not aedes publicae (public temples).[15] This less solemn designation would help explain how the building could have so easily lost its original name and purpose (Ziolkowski contends that it was originally the Temple of Mars in Campo)[16] in such a relatively short period of time.[17]

It had long been thought that the current building was built by Agrippa, with later alterations undertaken, and this was in part because of the inscription on the front of the temple[18] which reads:

The Pantheon dome.  The concrete for the coffered dome was poured in moulds, probably mounted on temporary scaffolding.  The oculus is the main source of natural light. 

The Pantheon in 2013, with notes showing the several inscriptions on the pediment. 

M·AGRIPPA·L·F·COS·TERTIVM·FECIT

or in full, "M[arcus] Agrippa L[ucii] f[ilius] co[n]s[ul] tertium fecit," meaning "Marcus Agrippa, son of Lucius, made [this building] when consul for the third time. "[19] However, archaeological excavations have shown that the Pantheon of Agrippa had been completely destroyed except for the façade.  Lise Hetland argues that the present construction began in 114, under Trajan, four years after it was destroyed by fire for the second time (Oros.  7.12).  She reexamined Herbert Bloch's 1959 paper, which is responsible for the commonly maintained Hadrianic date, and maintains that he should not have excluded all of the Trajanic-era bricks from his brick-stamp study.  Her argument is particularly interesting in light of Heilmeyer's argument that, based on stylistic evidence, Apollodorus of Damascus, Trajan's architect, was the obvious architect.[20]

The form of Agrippa's Pantheon is debated.  As a result of excavations in the late 19th century, archaeologist Rodolfo Lanciani concluded that Agrippa's Pantheon was oriented so that it faced South, in contrast with the current layout that faces North, and that it had a shortened T-shaped plan with the entrance at the base of the "T".  This description was widely accepted until the late 20th century.  While more recent archaeological diggings have suggested that Agrippa's building might have had a circular form with a triangular porch, and it might have also faced North, much like the later rebuildings, Ziolkowski complains that their conclusions were based entirely on surmise.  They didn't find any new datable material, yet they attributed everything they found to the Agrippan phase, failing to account for the fact that Domitian, known for his enthusiasm for building and known to have restored the Pantheon after 80 CE, might well have been responsible for everything they found.  Ziolkowski argues, convincingly, that Lanciani's initial assessment is still supported by all of the finds to date, including theirs; furthermore he expresses skepticism because the building they describe, "a single building composed of a huge pronaos and a circular cella of the same diameter, linked by a relatively narrow and very short passage (much thinner than the current intermediate block), has no known parallels in classical architecture and would go against everything we know of Roman design principles in general and of Augustan architecture in particular. "[21]

The only passages referring to the decoration of the Agrippan Pantheon written by an eyewitness are in Pliny's Natural History.  From him we know that "the capitals, too, of the pillars, which were placed by M. Agrippa in the Pantheon, are made of Syracusan bronze",[22] that "the Pantheon of Agrippa has been decorated by Diogenes of Athens, and the Caryatides, by him, which form the columns of that temple, are looked upon as masterpieces of excellence: the same, too, with the statues that are placed upon the roof,"[23] and that one of Cleopatra's pearls was cut in half so that each half "might serve as pendants for the ears of Venus, in the Pantheon at Rome".[24]

The Augustan Pantheon was destroyed along with other buildings in a huge fire in the year 80 AD.  Domitian rebuilt the Pantheon, which was burnt again in 110 AD.[25]

The degree to which the decorative scheme should be credited to Hadrian's architects is uncertain.  Finished by Hadrian but not claimed as one of his works, it used the text of the original inscription on the new façade (a common practice in Hadrian's rebuilding projects all over Rome; the only building on which Hadrian put his own name was the Temple to the Deified Trajan).[26] How the building was actually used is not known.  The Historia Augusta says that Hadrian dedicated the Pantheon (among other buildings) in the name of the original builder (Hadr.  19.10), but the current inscription could not be a copy of the original; it provides no information as to who Agrippa's foundation was dedicated to, and, in Ziolkowski's opinion, it was highly unlikely that in 25 BC Agrippa would have presented himself as "consul tertium."  On coins, the same words, "M. Agrippa L.f cos.  tertium," were the ones used to refer to him after his death; consul tertium serving as "a sort of posthumous cognomen ex virtute, a remembrance of the fact that, of all the men of his generation apart from Augustus himself, he was the only one to hold the consulship thrice. "[27] Whatever the cause of the alteration of the inscription might have been, the new inscription reflects the fact that there was a change in the building's purpose.[28]

Cassius Dio, a Graeco-Roman senator, consul and author of a comprehensive History of Rome, writing approximately 75 years after the Pantheon's reconstruction, mistakenly attributed the domed building to Agrippa rather than Hadrian.  Dio appears to be the only near-contemporaneous writer to mention the Pantheon.  Even by the year 200, there was uncertainty about the origin of the building and its purpose:

Agrippa finished the construction of the building called the Pantheon.  It has this name, perhaps because it received among the images which decorated it the statues of many gods, including Mars and Venus; but my own opinion of the name is that, because of its vaulted roof, it resembles the heavens. 

— Cassius Dio History of Rome 53.27.2

In 202, the building was repaired by the joint emperors Septimius Severus and his son Caracalla (fully Marcus Aurelius Antoninus), for which there is another, smaller inscription on the architrave of the facade, under the aforementioned larger text.[29][30] This now-barely legible inscription reads:

Medieval

An 1836 view of the Pantheon by Jakob Alt, showing twin bell towers, often misattributed to Bernini. 

In 609, the Byzantine emperorPhocas gave the building to Pope Boniface IV, who converted it into a Christian church and consecrated it to Santa Maria ad Martyres on 13 May 609: "Another Pope, Boniface, asked the same [Emperor Phocas, in Constantinople] to order that in the old temple called the Pantheon, after the pagan filth was removed, a church should be made, to the holy virgin Mary and all the martyrs, so that the commemoration of the saints would take place henceforth where not gods but demons were formerly worshipped. "[32] Twenty-eight cartloads of holy relics of martyrs were said to have been removed from the catacombs and placed in a porphyry basin beneath the high altar.[33]

The building's consecration as a church saved it from the abandonment, destruction, and the worst of the spoliation that befell the majority of ancient Rome's buildings during the early medieval period.  Paul the Deacon records the spoliation of the building by the Emperor Constans II, who visited Rome in July 663:

Remaining at Rome twelve days he pulled down everything that in ancient times had been made of metal for the ornament of the city, to such an extent that he even stripped off the roof of the church [of the blessed Mary], which at one time was called the Pantheon, and had been founded in honour of all the gods and was now by the consent of the former rulers the place of all the martyrs; and he took away from there the bronze tiles and sent them with all the other ornaments to Constantinople. 

One of the pilasters from the Pantheon in the British Museum

Much fine external marble has been removed over the centuries - for example, capitals from some of the pilasters are in the British Museum.[34] Two columns were swallowed up in the medieval buildings that abutted the Pantheon on the east and were lost.  In the early 17th century, Urban VIII Barberini tore away the bronze ceiling of the portico, and replaced the medieval campanile with the famous twin towers (often wrongly attributed to Bernini[35]) called "the ass's ears,"[36] which were not removed until the late 19th century.[37] The only other loss has been the external sculptures, which adorned the pediment above Agrippa's inscription.  The marble interior has largely survived, although with extensive restoration. 

Pope Urban VIII (1623 to 1644) ordered the bronze ceiling of the Pantheon's portico melted down.  Most of the bronze was used to make bombards for the fortification of Castel Sant'Angelo, with the remaining amount used by the Apostolic Camera for various other works.  It is also said that the bronze was used by Bernini in creating his famous baldachin above the high altar of St. Peter's Basilica, but, according to at least one expert, the Pope's accounts state that about 90% of the bronze was used for the cannon, and that the bronze for the baldachin came from Venice.[39] This led the Roman satirical figure Pasquino to quip: Quod non fecerunt barbari fecerunt Barberini ("What the barbarians did not do the Barberini [Urban VIII's family name] did"). 

In 1747, the broad frieze below the dome with its false windows was "restored," but bore little resemblance to the original.  In the early decades of the 20th century, a piece of the original, as could be reconstructed from Renaissance drawings and paintings, was recreated in one of the panels. 

Modern

The interior of the Pantheon in 2011

Two kings of Italy are buried in the Pantheon: Vittorio Emanuele II and Umberto I, as well as Umberto's Queen, Margherita.  Although Italy has been a republic since 1946, volunteer members of Italian monarchist organisations maintain a vigil over the royal tombs in the Pantheon.  This has aroused protests from time to time from republicans, but the Catholic authorities allow the practice to continue, although the Italian Ministry of Cultural Heritage is in charge of the security and maintenance. 

Structure

Portico

The northwest side view. 

The building was originally approached by a flight of steps, although later construction raised the level of the ground leading to the portico, eliminating the steps.[5]

The pediment was decorated with relief sculpture, probably of gilded bronze.  Holes marking the location of clamps that held the sculpture suggest that its design was likely an eagle within a wreath; ribbons extended from the wreath into the corners of the pediment.[40]

Mark Wilson Jones has attempted to explain the design adjustments carried out in relating the porch to the dome, arguing that the Pantheon's porch was originally designed for monolithic granite columns with shafts 50 Roman feet tall (weighing about 100 tons) and capitals 10 Roman feet tall in the Corinthian style.[41] The taller porch would have hidden the second pediment visible on the intermediate block.  Instead, after the intended columns failed to arrive, the builders made many awkward adjustments in order to use shafts 40 Roman feet tall and capitals eight Roman feet tall.[42] This substitution was probably a result of logistical difficulties at some stage in the construction.  The grey granite columns that were actually used in the Pantheon's pronaos were quarried in Egypt at Mons Claudianus in the eastern mountains.  Each was 39 feet (11.9 m) tall, 5 feet (1.5 m) in diameter, and 60 tons in weight.[43] These were dragged more than 100 km (62 miles) from the quarry to the river on wooden sledges.  They were floated by barge down the Nile River when the water level was high during the spring floods, and then transferred to vessels to cross the Mediterranean Sea to the Roman port of Ostia.  There, they were transferred back onto barges and pulled up the Tiber River to Rome.[44] After being unloaded near the Mausoleum of Augustus, the site of the Pantheon was still about 700 meters away.[45] Thus, it was necessary to either drag them or to move them on rollers to the construction site. 

The large bronze doors to the cella, once plated with gold, are ancient but not the original ones of the Pantheon.  The current doors – manufactured too small for the door frames – have been there since about the 15th century.[46]

Rotunda

Cross-section of the Pantheon showing how a 43.3 m diameter sphere fits under its dome. 

The 4,535 metric tons (4,999 short tons) weight of the Roman concrete dome is concentrated on a ring of voussoirs 9.1 metres (30 ft) in diameter that form the oculus, while the downward thrust of the dome is carried by eight barrel vaults in the 6.4 metres (21 ft) thick drum wall into eight piers.  The thickness of the dome varies from 6.4 metres (21 ft) at the base of the dome to 1.2 metres (3.9 ft) around the oculus.[47] The materials used in the concrete of the dome also varies.  At its thickest point, the aggregate is travertine, then terracotta tiles, then at the very top, tufa and pumice, both porous light stones.  At the very top, where the dome would be at its weakest and vulnerable to collapse, the oculus actually lightens the load.[48]

Beam in the dome of the Pantheon

No tensile test results are available on the concrete used in the Pantheon; however, Cowan discussed tests on ancient concrete from Roman ruins in Libya, which gave a compressive strength of 20 MPa (2,900 psi).  An empirical relationship gives a tensile strength of 1.47 MPa (213 psi) for this specimen.[47] Finite element analysis of the structure by Mark and Hutchison[49] found a maximum tensile stress of only 128 kPa (18.5 psi) at the point where the dome joins the raised outer wall.[50]

The stresses in the dome were found to be substantially reduced by the use of successively less dense aggregate stones, such as small pots or pieces of pumice, in higher layers of the dome.  Mark and Hutchison estimated that, if normal weight concrete had been used throughout, the stresses in the arch would have been some 80% greater.  Hidden chambers engineered within the rotunda form a sophisticated structural system.[51] This reduced the weight of the roof, as did the elimination of the apex by means of the oculus.[52]

The top of the rotunda wall features a series of brick relieving arches, visible on the outside and built into the mass of the brickwork.  The Pantheon is full of such devices – for example, there are relieving arches over the recesses inside – but all these arches were hidden by marble facing on the interior and possibly by stone revetment or stucco on the exterior. 

The height to the oculus and the diameter of the interior circle are the same, 43.3 metres (142 ft), so the whole interior would fit exactly within a cube (also, the interior could house a sphere 43.3 metres (142 ft) in diameter).[53] These dimensions make more sense when expressed in ancient Roman units of measurement: The dome spans 150 Roman feet; the oculus is 30 Roman feet in diameter; the doorway is 40 Roman feet high.[54] The Pantheon still holds the record for the world's largest unreinforced concrete dome.  It is also substantially larger than earlier domes.[55]

Though often drawn as a free-standing building, there was a building at its rear into which it abutted.  While this building helped buttress the rotunda, there was no interior passage from one to the other.[56]

Interior

The interior of the dome was possibly intended to symbolize the arched vault of the heavens.[53] The oculus at the dome's apex and the entry door are the only natural sources of light in the interior.  Throughout the day, the light from the oculus moves around this space in a reverse sundial effect.[57] The oculus also serves as a cooling and ventilation method.  During storms, a drainage system below the floor handles the rain that falls through the oculus. 

The dome features sunken panels (coffers), in five rings of 28.  This evenly spaced layout was difficult to achieve and, it is presumed, had symbolic meaning, either numerical, geometric, or lunar.[58][59] In antiquity, the coffers may have contained bronze stars, rosettes, or other ornaments. 

Circles and squares form the unifying theme of the interior design.  The checkerboard floor pattern contrasts with the concentric circles of square coffers in the dome.  Each zone of the interior, from floor to ceiling, is subdivided according to a different scheme.  As a result, the interior decorative zones do not line up.  The overall effect is immediate viewer orientation according to the major axis of the building, even though the cylindrical space topped by a hemispherical dome is inherently ambiguous.  This discordance has not always been appreciated, and the attic level was redone according to Neoclassical taste in the 18th century.[60]

Christian modifications

Church of St. Mary and the MartyrsChiesa Santa Maria dei MartiriSancta Maria ad Martyres

The present high altars and the apses were commissioned by Pope Clement XI (1700–1721) and designed by Alessandro Specchi.  Enshrined on the apse above the high altar is a 7th-century Byzantine icon of the Virgin and Child, given by Phocas to Pope Boniface IV on the occasion of the dedication of the Pantheon for Christian worship on 13 May 609.  The choir was added in 1840, and was designed by Luigi Poletti. 

The first niche to the right of the entrance holds a Madonna of the Girdle and St Nicholas of Bari (1686) painted by an unknown artist.  The first chapel on the right, the Chapel of the Annunciation, has a fresco of the Annunciation attributed to Melozzo da Forlì.  On the left side is a canvas by Clement Maioli of St Lawrence and St Agnes (1645–1650).  On the right wall is the Incredulity of St Thomas (1633) by Pietro Paolo Bonzi. 

The second niche has a 15th-century fresco of the Tuscan school, depicting the Coronation of the Virgin.  In the second chapel is the tomb of King Victor Emmanuel II (died 1878).  It was originally dedicated to the Holy Spirit.  A competition was held to decide which architect should design it.  Giuseppe Sacconi participated, but lost – he would later design the tomb of Umberto I in the opposite chapel. 

Manfredo Manfredi won the competition, and started work in 1885.  The tomb consists of a large bronze plaque surmounted by a Roman eagle and the arms of the house of Savoy.  The golden lamp above the tomb burns in honor of Victor Emmanuel III, who died in exile in 1947. 

The third niche has a sculpture by Il Lorenzone of St Anne and the Blessed Virgin.  In the third chapel is a 15th-century painting of the Umbrian school, The Madonna of Mercy between St Francis and St John the Baptist.  It is also known as the Madonna of the Railing, because it originally hung in the niche on the left-hand side of the portico, where it was protected by a railing.  It was moved to the Chapel of the Annunciation, and then to its present position sometime after 1837.  The bronze epigram commemorated Pope Clement XI's restoration of the sanctuary.  On the right wall is the canvas Emperor Phocas presenting the Pantheon to Pope Boniface IV (1750) by an unknown.  There are three memorial plaques in the floor, one conmmemorating a Gismonda written in the vernacular.  The final niche on the right side has a statue of St. Anastasio (1725) by Bernardino Cametti.[61]

On the first niche to the left of the entrance is an Assumption (1638) by Andrea Camassei.  The first chapel on the left, is the Chapel of St Joseph in the Holy Land, and is the chapel of the Confraternity of the Virtuosi at the Pantheon.  This refers to the confraternity of artists and musicians that was formed here by a 16th-century Canon of the church, Desiderio da Segni, to ensure that worship was maintained in the chapel. 

The first members were, among others, Antonio da Sangallo the younger, Jacopo Meneghino, Giovanni Mangone, Zuccari, Domenico Beccafumi, and Flaminio Vacca.  The confraternity continued to draw members from the elite of Rome's artists and architects, and among later members we find Bernini, Cortona, Algardi, and many others.  The institution still exists, and is now called the Academia Ponteficia di Belle Arti (The Pontifical Academy of Fine Arts), based in the palace of the Cancelleria.  The altar in the chapel is covered with false marble.  On the altar is a statue of St Joseph and the Holy Child by Vincenzo de Rossi. 

To the sides are paintings (1661) by Francesco Cozza, one of the Virtuosi: Adoration of the Shepherds on left side and Adoration of the Magi on right.  The stucco relief on the left, Dream of St Joseph, is by Paolo Benaglia, and the one on the right, Rest during the flight from Egypt, is by Carlo Monaldi.  On the vault are several 17th-century canvases, from left to right: Cumean Sibyl by Ludovico Gimignani; Moses by Francesco Rosa; Eternal Father by Giovanni Peruzzini; David by Luigi Garzi; and Eritrean Sibyl by Giovanni Andrea Carlone. 

The second niche has a statue of St Agnes, by Vincenzo Felici.  The bust on the left is a portrait of Baldassare Peruzzi, derived from a plaster portrait by Giovanni Duprè.  The tomb of King Umberto I and his wife Margherita di Savoia is in the next chapel.  The chapel was originally dedicated to St Michael the Archangel, and then to St. Thomas the Apostle.  The present design is by Giuseppe Sacconi, completed after his death by his pupil Guido Cirilli.  The tomb consists of a slab of alabaster mounted in gilded bronze.  The frieze has allegorical representations of Generosity, by Eugenio Maccagnani, and Munificence, by Arnaldo Zocchi.  The royal tombs are maintained by the National Institute of Honour Guards to the Royal Tombs, founded in 1878.  They also organize picket guards at the tombs.  The altar with the royal arms is by Cirilli. 

The third niche holds the mortal remains – his Ossa et cineres, "Bones and ashes", as the inscription on the sarcophagus says – of the great artist Raphael.  His fiancée, Maria Bibbiena is buried to the right of his sarcophagus; she died before they could marry.  The sarcophagus was given by Pope Gregory XVI, and its inscription reads ILLE HIC EST RAPHAEL TIMUIT QUO SOSPITE VINCI / RERUM MAGNA PARENS ET MORIENTE MORI, meaning "Here lies Raphael, by whom the mother of all things (Nature) feared to be overcome while he was living, and while he was dying, herself to die".  The epigraph was written by Pietro Bembo. 

The present arrangement is from 1811, designed by Antonio Munoz.  The bust of Raphael (1833) is by Giuseppe Fabris.  The two plaques commemorate Maria Bibbiena and Annibale Carracci.  Behind the tomb is the statue known as the Madonna del Sasso (Madonna of the Rock) so named because she rests one foot on a boulder.  It was commissioned by Raphael and made by Lorenzetto in 1524. 

In the Chapel of the Crucifixion, the Roman brick wall is visible in the niches.  The wooden crucifix on the altar is from the 15th century.  On the left wall is a Descent of the Holy Ghost (1790) by Pietro Labruzi.  On the right side is the low relief Cardinal Consalvi presents to Pope Pius VII the five provinces restored to the Holy See (1824) made by the Danish sculptor Bertel Thorvaldsen.  The bust is a portrait of Cardinal Agostino Rivarola.  The final niche on this side has a statue of St. Rasius (S. Erasio) (1727) by Francesco Moderati.[61]

The style of the Pantheon can be detected in many buildings of the 19th and 20th centuries; numerous government and public buildings, city halls, universities, and public libraries echo its portico-and-dome structure. 

Notes

^Infrequently Latinized as Pantheum, as in Pliny's Natural History (XXXVI.38): "The Pantheon of Agrippa was embellished by Diogenes of Athens; and among the supporting members of this temple there are Caryatids that are almost in a class of their own, and the same is true of the figures on the angles of the pediment, which are, however, not so well known because of their lofty position," as translated by D.E. Eichholz (Agrippae Pantheum decoravit Diogenes Atheniensis; in columnis templi eius Caryatides probantur inter pauca operum, sicut in fastigio posita signa, sed propter altitudinem loci minus celebrata). 

^MacDonald 1976, p. 33 "There are openings in it [the rotunda] here and there, at various levels, that give on to some of the many different chambers that honeycomb the rotunda structure, a honeycombing that is an integral part of a sophisticated engineering solution..."

^

^ abRoth 1992, p. 36

^Claridge 1998, pp.  204–5

^Lancaster 2005, pp.  44–46

^MacDonald 1976, p. 34, Wilson-Jones 2000, p. 191

^Wilson-Jones 2003, The Enigma of the Pantheon: The Interior, pp.  182–184

^Lancaster 2005, p. 46

^Wilson-Jones 2003, The Enigma of the Pantheon: The Interior, pp.  182–183. 

^Wilson-Jones 2003, The Enigma of the Pantheon: The Interior, pp.  184–197

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