Two architectural prints after the originals by Alessandro Specchi, Prospetto della Basilica Vaticana (1705) and Palmo Romano, Veduta Interiore della Gran Basilica di S. Pietro in Vaticano (1687)one depicting the exterior and the plan of the portico of St. Peter's Basilica, 70.5 x 47 cm; together with one depicting a cross-sectional interior of the same basilica, 70 x 50.5 cm