Speculum Romanae Magnificentiae: Plan of St. Peter's 1549

This detailed plan of St. Peter's Basilica, created by Antonio da Sangallo the Younger in 1549, is a testament to the ambition and architectural brilliance of the Renaissance. The plan outlines the basilica's intricate layout, showcasing its grand scale and the complex interplay of spaces, including the central dome, the nave, and the surrounding chapels. This drawing, a masterpiece of architectural design, showcases Sangallo's vision for St. Peter's, which would be further developed by subsequent architects.