St. Peter's Basilica, Rome | San Lorenzo, Milan   Prof. Dale Kinney describes the development of the basilica form of ecclesiastical architecture in Rome through the surviving evidence of the destroyed building of Old St. Peter's. During the same period, a second major architectural form emerged, the central planned church, explored through the Church of San Lorenzo in Milan. Italy, Rome, Old St. Peter's, Nave looking east, Drawing by Grimaldi Italy, Milan, San Lorenzo, Exterior View back to top briefing | image index | resources home page | site image index | site resources media center for art history, archaeology and historic preservationcolumbia university