Columbia subject headings:
Abbadia San Salvatore (Siena, Italy)
Siena (Italy)--Buildings, structures, etc.
Harvard subject headings:
Abbadia San Salvatore (Siena, Italy)
Church architecture--Italy--Abbadia San Salvatore.
Church buildings--Italy--Abbadia San Salvatore.
Siena (Italy)--Buildings, structures, etc.
Siena (Italy)--Church history.
Princeton subject headings:
Abbadia San Salvatore (Siena, Italy)
Siena (Italy)--Buildings, structures, etc.