The Renaissance man avant la lettre. Vitruvius (Marcus V. Pollio) Roman architect and engineer studied Greek philosophy and science and gained experience in the course of professional work. He was one of those appointed to be overseers of imperial artillery or military engines and was architect of at least one unit of buildings for Augustus in the reconstruction of Rome. Late in life and in ill health he completed sometime before 27 BC De Architectura which after its rediscovery in the fifteenth century was influential enough to be studied by architects from the early Renaissance to recent times. In On Architecture Vitruvius adds to the tradition of Greek theory and practice the results of his own experience. The contents of this treatise in ten books are as follows. Book 1: Requirements for an architect; town planning; design cities aspects; temples. 2: Materials and their treatment. Greek systems. 3: Styles. Forms of Greek temples. Ionic. 4: Styles. Corinthian Ionic Doric; Tuscan; altars. 5: Other public buildings (fora basilicae theaters colonnades baths harbors). 6: Sites and planning especially of houses. 7: Construction of pavements roads mosaic floors vaults. Decoration (stucco wall painting colors). 8: Hydraulic engineering; water supply; aqueducts. 9: Astronomy. Greek and Roman discoveries; signs of the zodiac planets moon phases constellations astrology gnomon sundials. 10: Machines for war and other purposes.