Columbia subject headings:
Harvard subject headings:
Alexander VII, Pope, 1599-1667.
Architecture--Details
Architecture--Italy--Siena--Sources.
Church architecture--Italy--Siena--Sources.
Church architecture--Italy--Siena.
Duomo di Siena.
Siena (Italy)--Buildings, structures, etc.
Princeton subject headings:
Architecture--Details.
Architecture--Italy--Siena--Sources.
Church architecture--Italy--Siena.
Duomo di Siena.
Siena (Italy)--Buildings, structures, etc.