Columbia subject headings:
Harvard subject headings:
Architecture, Early Christian--Italy--Nonantola.
Architecture, Medieval--Italy--Nonantola.
Architecture, Romanesque--Italy--Nonantola.
Architecture--Italy--Nonantola.
Nonantola (Italy)--Buildings, structures, etc.
San Michele (Abbey : Nonantola, Italy)
San Silvestro (Abbey : Nonantola, Italy)
Princeton subject headings:
Architecture, Early Christian--Italy--Nonantola.
Architecture, Romanesque--Italy--Nonantola.
Architecture--Italy--Nonantola--Conservation and Restoration--History.
San Michele Arcangelo (Church : Nonantola, Italy)--History.
San Silvestro (Church : Nonantola, Italy)--History.