Columbia subject headings:
Architecture--Italy--Pienza.
City planning--Italy--Pienza.
Pienza (Italy)--History.
Harvard subject headings:
Architecture, Renaissance--Italy--Pienza.
Cities and towns--Italy--Orcia River Valley.
City planning--Italy--Pienza--History.
Historic buildings--Italy--Orcia River Valley.
Pienza (Italy)--Buildings, structures, etc.
Princeton subject headings:
Architecture--Italy--Pienza.
City planning--Italy--Pienza.
Pienza (Italy)--Buildings, structures, etc.
Pienza (Italy)--History.