Columbia subject headings:
Bologna (Italy)--History--To 1506.
Painters--Italy--Bologna.
Painting, Italian--Italy--Bologna--14th century.
Painting, Italian--Italy--Bologna--15th century.
Painting, Medieval--Italy--Bologna.
Harvard subject headings:
Painters--Italy--Bologna.
Painting, Italian--Italy--Bologna--14th century.
Princeton subject headings:
Bologna (Italy)--History--To 1506.
Painters--Italy--Bologna.
Painting, Italian--Italy--Bologna--14th century.
Painting, Italian--Italy--Bologna--15th century.
Painting, Medieval--Italy--Bologna.