First published in Rome in 1583 with commentaries by Father Egnazio Danti, Vignola's treatise is one of the main Renaissance sources on perspective. It illustrates the "two rules" of perspective drawing and selected instruments and optical games in the Medici collection, such as Baldassarre Lanci's distance meter and the catoptric double portrait (i.e., visible with a mirror) by Ludovico Buti.