"In the Sala delle Prospettive on the upper story of the Villa Farnesina, Peruzzi revived the perspective schemes of Melozzo da Forli and Mantegna, possibly under the influence of both. The perspective was planned to function correctly when the observer is standing toward the left of the room. Peruzzi has designed a splendid architecture of dark, veined marble piers and columns with gilded capitals that incorporates the actual veined marble door frames in the room. The frescoed architecture is so precisely painted that it is almost impossible to distinguish where the real marble ends and the illusion begins. Through the lofty columns one looks out to a painted terrace that opens onto a continuous landscape".
Krén, E, and Marx, D. “Perspective view of the Sala delle Prospettive”. Web Gallery of Art. https://www.wga.hu/html_m/p/peruzzi/farnesi3.html