Translating to "The Four Books of Architecture", this work by Palladio is a set of nine rules on architecture from walls to details. This work was published in Venice in 1570. The designs mix Roman influence with the new ways of thinking from the renaissance. Widely disseminated, this book influenced architectural design for years to come. This information comes from http://architectura.cesr.univ-tours.fr/traite/Notice/ENSBA_LES1338.asp?p.... The image is taken from Wikimedia commons, from Sailko.