De architectura

De architectura (On architecture, published as Ten Books on Architecture) is a treatise on architecture written by the Roman architect and military engineer Marcus Vitruvius Pollio and dedicated to his patron, the emperor Caesar Augustus, as a guide for building projects. As the only treatise on architecture to survive from antiquity, it has been regarded since the Renaissance as the first known book on architectural theory, as well as a major source on the canon of classical architecture.

It contains a variety of information on Greek and Roman buildings, as well as prescriptions for the planning and design of military camps, cities, and structures both large (aqueducts, buildings, baths, harbours) and small (machines, measuring devices, instruments). Since Vitruvius wrote early in the Roman architectural revolution that saw the full development of cross vaulting, domes, concrete, and other innovations associated with Imperial Roman architecture, his ten books give little information on these distinctive innovations of Roman building design and technology.

From references to them in the text, it is known that there were at least a few illustrations in original copies (perhaps eight or ten), but perhaps only one of these survived in any medieval manuscript copy. This deficiency was remedied in 16th-century printed editions, which became illustrated with many large plates.

Copies were made during the Carolingian Renaissance, but little use was made of them until the 15th century, when the work became of great interest and influence, initially in Italy and then in the rest of Europe.

Probably written between 30–20 BC, it combines the knowledge and views of many antique writers, Greek and Roman, on architecture, the arts, natural history and building technology. Vitruvius cites many authorities throughout the text, often praising Greek architects for their development of temple building and the orders (Doric, Ionic and Corinthian), and providing key accounts of the origins of building in the primitive hut.

The Roman author gives advice on the qualifications of an architect (Book I) and on types of architectural drawing.

Though often cited for his famous "triad" of characteristics associated with architecture – utilitas, firmitas and venustas (utility, strength and beauty) – the aesthetic principles that influenced later treatise writers were outlined in Book III. Derived partially from Latin rhetoric (through Cicero and Varro), Vitruvian terms for order, arrangement, proportion, and fitness for intended purposes have guided architects for centuries, and continue to do so.

The ten books or scrolls are organized as follows: