The year 1575 sees the posthumous publication of Estraordinario libro, the eighth and final volume of Italian architect, painter, and theorist Sebastiano Serlio’s immensely influential Tutte l'opere d'architettura, et prospetiva ("Complete Works on Architecture and Perspective.” L’Architettura, as it is called, is the first architectural handbook to emphasize the practical rather than the theoretical aspects of architecture, and the first to catalog the five orders.

The eighth volume contains fifty fanciful designs for doorways.