I Quattro Libri dell'Architettura (the four books of architecture) is an Italian treatise on architecture by the architect Andrea Palladio (1508–1580).
It was first published in four volumes in 1570 in Venice, illustrated with engravings 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 1716–1720.