Basilica di Santo Stefano Bologna, Italy

Santo Stefano is a monastic complex of four Romanesque churches (11-13C) built on the site of a pagan temple to Isis and incorporating earlier churches dating back to the 4th century. There is also a medieval cloister and small museum.

Overview of the Basilica di Santo Stefano monastic complex (mostly 5th-12th cent.), Bologna, Italy. From left: Santi Vitale e Agricola, San Sepolcro, Church of the Martyrium. Image credit: Holly Hayes