Columbia subject headings:
Architecture, Renaissance--Italy--Bologna.
Architecture--Italy--Bologna--History--16th century.
Piazza maggiore (Bologna, Italy)
Harvard subject headings:
Architecture, Renaissance--Italy--Bologna.
Architecture--Italy--Bologna--16th century.
Piazza maggiore (Bologna, Italy)
Princeton subject headings:
Architecture, Renaissance--Italy--Bologna.
Architecture--Italy--Bologna.
Bologna (Italy)--Buildings, structures, etc.