Vitruvius
Vitruvius (; c. 80–70 BC – after c. 15 BC) was a Roman architect and engineer during the 1st century BC, known for his multi-volume work entitled "De architectura". He originated the idea that all buildings should have three attributes: , , and ("strength", "utility", and "beauty"). These principles were later widely adopted in Roman architecture. His discussion of perfect proportion in architecture and the human body led to the famous Renaissance drawing of the "Vitruvian Man" by Leonardo da Vinci. Little is known about Vitruvius' life, but by his own description he served as an artilleryman, the third class of arms  in the Roman military offices. He probably served as a senior officer of artillery in charge of "doctores ballistarum" (artillery experts) and "libratores" who actually operated the machines. As an army engineer he specialized in the construction of "ballista" and "scorpio" artillery war machines for sieges. It is possible that Vitruvius served with Julius Caesar's chief engineer Lucius Cornelius Balbus. Vitruvius' "De architectura" was widely copied and survives in many dozens of manuscripts throughout the Middle Ages, though in 1414 it was "rediscovered" by the Florentine humanist Poggio Bracciolini in the library of Saint Gall Abbey. Leon Battista Alberti  published it in his seminal treatise on architecture, "De re aedificatoria" (c. 1450). The first known Latin printed edition was by Fra Giovanni Sulpitius in Rome in 1486. Translations followed in Italian, French, English, German, Spanish, and several other languages. Though the original illustrations have been lost, the first illustrated edition was published in Venice in 1511 by Fra Giovanni Giocondo, with woodcut illustrations based on descriptions in the text. Life and career. Little is known about Vitruvius' life. Most inferences about him are extracted from his only surviving work "De Architectura". His full name is sometimes given as "Marcus  Vitruvius Pollio", but both the first and last names are uncertain. Marcus Cetius Faventinus writes of "Vitruvius Polio aliique auctores"; this can be read as "Vitruvius Polio, and others" or, less likely, as "Vitruvius, Polio, and others". An inscription in Verona, which names a "Lucius Vitruvius Cordo", and an inscription from Thilbilis in North Africa, which names a "Marcus Vitruvius Mamurra" have been suggested as evidence that Vitruvius and Mamurra (who was a military "praefectus fabrum" under Julius Caesar) were from the same family; or were even the same individual. Neither association, however, is borne out by "De Architectura" (which  Vitruvius dedicated to Augustus), nor by the little that is known of Mamurra. Vitruvius was a military engineer ("praefectus fabrum"), or a "praefect architectus armamentarius" of the "apparitor" status group (a branch of the Roman civil service). He is mentioned in Pliny the Elder's table of contents for "Naturalis Historia" (Natural History), in the heading for mosaic techniques. Frontinus refers to "Vitruvius the architect" in his late 1st-century work "De aquaeductu". Likely born a free Roman citizen, by his own account, Vitruvius served in the Roman army under Caesar with the otherwise poorly identified Marcus Aurelius, Publius Minidius , and Gnaeus Cornelius. These names vary depending on the edition of "De architectura". Publius Minidius is also written as Publius Numidicus and Publius Numidius, speculated as the same Publius Numisius inscribed on the Roman Theatre at Heraclea. As an army engineer he specialized in the construction of "ballista" and "scorpio" artillery war machines for sieges. It is speculated that Vitruvius served with Caesar's chief engineer Lucius Cornelius Balbus. The locations where he served can be reconstructed from, for example, descriptions of the building methods of various "foreign tribes". Although he describes places throughout "De Architectura", he does not say  he was present. His service likely included north Africa, Hispania, Gaul (including Aquitaine) and Pontus. To place the role of Vitruvius the military engineer in context, a description of "The Prefect of the camp" or army engineer is quoted here as given by Flavius Vegetius Renatus in "The Military Institutions of the Romans": The Prefect of the camp, though inferior in rank to the [Prefect], had a post of no small importance. The position of the camp, the direction of the entrenchments, the inspection of the tents or huts of the soldiers and the baggage were comprehended in his province . His authority extended over the sick, and the physicians who had the care of them; and he regulated the expenses relative thereto. He had the charge of providing carriages, bathhouses and the proper tools for sawing and cutting wood, digging trenches, raising parapets, sinking wells and bringing water into the camp. He likewise had the care of furnishing the troops with wood and straw, as well as the rams, "onagri," "balistae" and all the other engines of war under his direction. This post was always conferred on an officer of great skill, experience and long service, and who consequently was  capable of instructing others in those branches of the profession in which he had distinguished himself. At various locations described by Vitruvius, battles and sieges occurred. He is the only source for the siege of Larignum in 56 BC. Of the battlegrounds of the Gallic War there are references to: These are all sieges of large Gallic "oppida". Of the sites involved in Caesar's civil war, we find the Siege of Massilia in 49 BC, the Battle of Dyrrhachium of 48 BC (modern Albania), the Battle of Pharsalus in 48 BC (Hellas – Greece), the Battle of Zela of 47  BC (modern Turkey), and the Battle of Thapsus in 46 BC in Caesar's African campaign. A legion that fits the same sequence of locations is the Legio VI Ferrata, of which "ballista" would be an auxiliary unit. Mainly known for his writings, Vitruvius was himself an architect. In Roman times architecture was a broader subject than at present including the modern fields of architecture, construction management, construction engineering, chemical engineering, civil engineering, materials engineering, mechanical engineering, military engineering and urban planning; architectural engineers consider him the first of their discipline, a specialization previously known as technical architecture. In his  work describing the construction of military installations, he also commented on the miasma theory – the idea that unhealthy air from wetlands was the cause of illness, saying: Frontinus mentions Vitruvious in connection with the standard sizes of pipes: the role he is most widely respected. He is often credited as father of architectural acoustics for describing the technique of "echeas" placement in theaters. The only building, however, that we know Vitruvius to have worked on is one he tells us about, a "basilica" completed in 19 BC. It was built at Fanum Fortunae, now the modern town of Fano. The  Basilica di Fano (to give the building its Italian name) has disappeared so completely that its very site is a matter of conjecture, although various attempts have been made to visualise it. The early Christian practice of converting Roman "basilicae" (public buildings) into cathedrals implies the "basilica" may be incorporated into the cathedral in Fano. In later years the emperor Augustus, through his sister Octavia Minor, sponsored Vitruvius, entitling him with what may have been a pension to guarantee financial independence. Whether "De architectura" was written by one author or is a compilation completed by subsequent librarians and copyists, remains  an open question. The date of his death is unknown, which suggests that he had enjoyed only little popularity during his lifetime. Gerolamo Cardano, in his 1552 book "De subtilitate rerum", ranks Vitruvius as one of the 12 persons whom he supposes to have excelled all men in the force of genius and invention; and would not have scrupled to have given him the first place, if it could be imagined that he had delivered nothing but his own discoveries. Section::::"De architectura". Vitruvius is the author of "De architectura, libri decem", known today as "The Ten Books on Architecture", a  treatise written in Latin on architecture, dedicated to the emperor Augustus. In the preface of Book I, Vitruvius dedicates his writings so as to give personal knowledge of the quality of buildings to the emperor. Likely Vitruvius is referring to Marcus Agrippa's campaign of public repairs and improvements. This work is the only surviving major book on architecture from classical antiquity. According to Petri Liukkonen, this text "influenced deeply from the Early Renaissance onwards artists, thinkers, and architects, among them Leon Battista Alberti (1404–1472), Leonardo da Vinci (1452–1519), and Michelangelo (1475–1564)." The next major book on architecture, Alberti's  reformulation of "Ten Books", was not written until 1452. Vitruvius is famous for asserting in his book "De architectura" that a structure must exhibit the three qualities of "firmitatis, utilitatis, venustatis" – that is, stability, utility, beauty. These are sometimes termed the Vitruvian virtues or the Vitruvian Triad. According to Vitruvius, architecture is an imitation of nature. As birds and bees built their nests, so humans constructed housing from natural materials, that gave them shelter against the elements. When perfecting this art of building, the Greeks invented the architectural orders: Doric, Ionic and Corinthian. It gave them a sense of proportion , culminating in understanding the proportions of the greatest work of art: the human body. This led Vitruvius in defining his Vitruvian Man, as drawn later by Leonardo da Vinci: the human body inscribed in the circle and the square (the fundamental geometric patterns of the cosmic order). In this book series, Vitruvius, also wrote about climate in relation to housing architecture and how to choose locations for cities. Scope. Vitruvius is sometimes loosely referred to as the first architect, but it is more accurate to describe him as the first Roman architect to have written surviving records of his field . He himself cites older but less complete works. He was less an original thinker or creative intellect than a codifier of existing architectural practice. Vitruvius had a much wider scope than modern architects. Roman architects practised a wide variety of disciplines; in modern terms, they could be described as being engineers, architects, landscape architects, surveyors, artists, and craftsmen combined. Etymologically the word architect derives from Greek words meaning 'master' and 'builder'. The first of the "Ten Books" deals with many subjects which now come within the scope of landscape architecture. In Book I, Chapter 1, titled The Education of the  Architect, Vitruvius instructs... He goes on to say that the architect should be versed in drawing, geometry, optics (lighting), history, philosophy, music, theatre, medicine, and law. In Book I, Chapter 3 ("The Departments of Architecture"), Vitruvius divides architecture into three branches, namely; building; the construction of sundials and water clocks; and the design and use of machines in construction and warfare. He further divides building into public and private. Public building includes city planning, public security structures such as walls, gates and towers; the convenient placing of public facilities such as theatres, forums and markets, baths, roads and pavings; and  the construction and position of shrines and temples for religious use. Later books are devoted to the understanding, design and construction of each of these. Proportions of man. In Book III, Chapter 1, Paragraph 3, Vitruvius writes about the proportions of man: It was upon these writings that Renaissance engineers, architects and artists like Mariano di Jacopo Taccola, Pellegrino Prisciani and Francesco di Giorgio Martini and finally Leonardo da Vinci based the illustration of the Vitruvian Man. Vitruvius described the human figure as being the principal source of proportion. The drawing itself is often used as an implied symbol of  the essential symmetry of the human body, and by extension, of the universe as a whole. Lists of names given in Book VII Introduction. In the introduction to book seven, Vitruvius goes to great lengths to present why he is qualified to write "De Architectura". This is the only location in the work where Vitruvius specifically addresses his personal breadth of knowledge. Similar to a modern reference section, the author's position as one who is knowledgeable and educated is established. The topics range across many fields of expertise reflecting that in Roman times as today construction is a diverse  field. Vitruvius is clearly a well-read man. In addition to providing his qualification, Vitruvius summarizes a recurring theme throughout the 10 books, a non-trivial and core contribution of his treatise beyond simply being a construction book. Vitruvius makes the point that the work of some of the most talented are unknown, while many of those of lesser talent but greater political position are famous. This theme runs through Vitruvius's ten books repeatedly – echoing an implicit prediction that he and his works will also be forgotten. Vitruvius illustrates this point by naming what he considers are the most  talented individuals in history. Implicitly challenging the reader that they have never heard of some of these people, Vitruvius goes on and predicts that some of these individuals will be forgotten and their works lost, while other, less deserving political characters of history will be forever remembered with pageantry. Rediscovery. Vitruvius' "De architectura" was "rediscovered" in 1414 by the Florentine humanist Poggio Bracciolini in the library of Saint Gall Abbey. Leon Battista Alberti (1404–1472) publicised it in his seminal treatise on architecture, "De re aedificatoria" (c. 1450). The first known Latin printed edition was by Fra Giovanni Sulpitius in Rome , 1486. Translations followed in Italian (Cesare Cesariano, 1521), French (Jean Martin, 1547), English, German (, 1543) and Spanish and several other languages. The original illustrations had been lost and the first illustrated edition was published in Venice in 1511 by Fra Giovanni Giocondo, with woodcut illustrations based on descriptions in the text. Later in the 16th-century Andrea Palladio provided illustrations for Daniele Barbaro's commentary on Vitruvius, published in Italian and Latin versions. The most famous illustration is probably Da Vinci's "Vitruvian Man". The surviving ruins of Roman antiquity, the Roman Forum, temples, theatres, triumphal arches and their reliefs  and statues offered visual examples of the descriptions in the Vitruvian text. Printed and illustrated editions of "De Architectura" inspired Renaissance, Baroque and Neoclassical architecture. Filippo Brunelleschi, for example, invented a new type of hoist to lift the large stones for the dome of the cathedral in Florence and was inspired by "De Architectura" as well as surviving Roman monuments such as the Pantheon and the Baths of Diocletian. Notable editions. Latin Italian French English Roman technology. Books VIII, IX and X form the basis of much of what we know about Roman technology, now augmented by archaeological studies of  extant remains, such as the water mills at Barbegal in France. The other major source of information is the "Naturalis Historia" compiled by Pliny the Elder much later in c. 75 AD. Machines. The work is important for its descriptions of the many different machines used for engineering structures such as hoists, cranes and pulleys, as well as war machines such as catapults, "ballistae," and siege engines. As a practising engineer, Vitruvius must be speaking from personal experience rather than simply describing the works of others. He also describes the construction of sundials and water clocks, and the use of  an aeolipile (the first steam engine) as an experiment to demonstrate the nature of atmospheric air movements (wind). Aqueducts. His description of aqueduct construction includes the way they are surveyed, and the careful choice of materials needed, although Frontinus (a general who was appointed in the late 1st century AD to administer the many aqueducts of Rome), writing a century later, gives much more detail of the practical problems involved in their construction and maintenance. Surely Vitruvius' book would have been of great assistance in this. Vitruvius was writing in the 1st century BC when many of the finest Roman  aqueducts were built, and survive to this day, such as those at Segovia and the Pont du Gard. The use of the inverted siphon is described in detail, together with the problems of high pressures developed in the pipe at the base of the siphon, a practical problem with which he seems to be acquainted. Materials. He describes many different construction materials used for a wide variety of different structures, as well as such details as stucco painting. Concrete and lime receive in-depth descriptions. Vitruvius is cited as one of the earliest sources to connect lead mining and manufacture , its use in drinking water pipes, and its adverse effects on health. For this reason, he recommended the use of clay pipes and masonry channels in the provision of piped drinking-water. Vitruvius is the source for the anecdote that credits Archimedes with the discovery of the mass-to-volume ratio while relaxing in his bath. Having been asked to investigate the suspected adulteration of the gold used to make a crown, Archimedes realised that the crown's volume could be measured exactly by its displacement of water, and ran into the street with the cry of" Eureka!" Dewatering machines . He describes the construction of Archimedes' screw in Chapter X (without mentioning Archimedes by name). It was a device widely used for raising water to irrigate fields and drain mines. Other lifting machines he mentions include the endless chain of buckets and the reverse overshot water-wheel. Remains of the water wheels used for lifting water were discovered when old mines were re-opened at Rio Tinto in Spain, Rosia Montana in Romania and Dolaucothi in west Wales. The Rio Tinto wheel is now shown in the British Museum, and the Dolaucothi specimen in the National Museum of Wales. Surveying  instruments. That he must have been well practised in surveying is shown by his descriptions of surveying instruments, especially the water level or "chorobates," which he compares favourably with the "groma," a device using plumb lines. They were essential in all building operations, but especially in aqueduct construction, where a uniform gradient was important to the provision of a regular supply of water without damage to the walls of the channel. He also developed one of the first odometers, consisting of a wheel of known circumference that dropped a pebble into a container on every rotation. Central heating. He describes  the many innovations made in building design to improve the living conditions of the inhabitants. Foremost among them is the development of the "hypocaust," a type of central heating where hot air developed by a fire was channelled under the floor and inside the walls of public baths and villas. He gives explicit instructions how to design such buildings so that fuel efficiency is maximised, so that for example, the "caldarium" is next to the "tepidarium" followed by the "frigidarium". He also advises on using a type of regulator to control the heat in the hot rooms, a bronze disc  set into the roof under a circular aperture which could be raised or lowered by a pulley to adjust the ventilation. Although he does not suggest it himself, it is likely that his dewatering devices such as the reverse overshot water-wheel were used in the larger baths to lift water to header tanks at the top of the larger "thermae", such as the Baths of Diocletian. The one which was used in Bath of Caracalla for grinding flour. (Morris Hicky Morgan translation with illustrations)