Columbia subject headings:
Harvard subject headings:
Church history--Middle Ages, 600-1500
Church history--Primitive and early church, ca. 30-600
Church history--Primitive and early church, ca. 30-600.
Historic buildings--Italy--Rome
Rome (Italy)--Buildings, structures, etc.
Rome (Italy)--History--476-1420.
Rome (Italy)--History--To 476
Rome--History--Empire, 284-476.
Princeton subject headings:
Church history--Middle Ages, 600-1500.
Church history--Primitive and early church, ca. 30-600.
Rome (Italy)--Buildings, structures, etc.
Rome (Italy)--History--476-1420.
Rome (Italy)--History--To 476.