I quattro libri dell'architettura (The Four Books of Architecture) is a treatise on architecture by the architect Andrea Palladio (1508–1580), written in Italian. It was first published in four volumes in 1570 in Venice, illustrated with woodcuts after the author's own drawings. It has been reprinted and translated many times, often in single-volume format. Book I was first published in English in 1663 in a London edition by Godfrey Richards. The first complete English language edition was published in London by the Italian-born architect Giacomo Leoni in 1715–1720. Organization The treatise is divided into four books: The first book discusses building materials and techniques. It documents five classical orders (Doric, Ionic, Corinthian, Tuscan, Composite) in all their parts (bases, columns, architraves, arches, capitals, trabeations), as well as discussing other building elements (vaulted ceilings, floors, doors and windows, fireplaces, roofs and stairs). The second book covers the designs of private urban townhouses and country villas of the 1500s, in and around Venice, almost all designed by Palladio himself. This includes nine palazzi, 22 villas (13 of them completed, another five partly completed), and a series of unrealized projects. The plates of completed projects sometimes differ from the buildings as actually constructed. The third book addresses matters of city planning: streets, stone street paving, bridges of both stone and wood, and piazzas, with examples drawn from Roman origins alongside contemporary examples; also basilicas, including the basilica designed by Vitruvius in Fano and the important Basilica Palladiana in Vicenza. The fourth book contains five chapters of general introduction, then 26 chapters, each of which describe the designs of specific Roman temples dating from antiquity, along with one contemporary church design. (The exception is the San Pietro in Montorio, designed by Donato Bramante, consecrated in the year 1500.) Palladio's selections range geographically from Rome, Naples, Spoleto, Assisi, Pola and Nîmes. Illustrations of the temples include careful measurements of existing building elements, together with Palladio's own conjectural interpretations of the temple's facades where only fragments remained, as at the Temple of Trajan. The 26 temples discussed in include: Chap. VI. Of the Draughts of some ancient Temples that are in Rome, and first of the Temple of Peace (Temple of Peace, Rome) Chap. VII. Of the Temple of Mars the Avenger (at the Forum of Augustus) Chap. VIII. Of the Temple of Nerva Trajan (Temple of Trajan) Chap. IX. Of the Temple of Antoninius and