Columbia subject headings:
Harvard subject headings:
Basilica di S. Vitale (Ravenna, Italy)--History.
Buildings, Octagonal.
Church architecture--Europe--History.
Church architecture--Italy--Ravenna.
Church buildings--Europe--Design and construction--History--To 1500.
Church buildings--Italy--Ravenna--Design and construction--History--To 1500.
Church history--Primitive and early church, ca. 30-600
Princeton subject headings:
Basilica di S. Vitale (Ravenna, Italy)--History.
Buildings, Octagonal.
Church architecture--Europe--History.
Church architecture--Italy--Ravenna.
Church buildings--Europe--Design and construction--History--To 1500.
Church buildings--Italy--Ravenna--Design and construction--History--To 1500.
Church history--Primitive and early church, ca. 30-600.