During the Renaissance, architecture became not only a question of practice, but also a matter for theoretical discussion. The first treatise on architecture was "On the Art of Building" by Leon Battista Alberti in 1450. De re aedificatoria in 1485 became the first printed book on architecture. Sebastiano Serlio produced the next important text entitled "General Rules of Architecture". In 1570, Andrea Palladio published "The Four Books of Architecture" in Venice. This book was widely printed and responsible to a great degree for spreading the ideas of the Renaissance through Europe.