Columbia subject headings:
Art--Political aspects--Italy--Rome--History--To 1500.
Papacy--History--1309-1378.
Popes--Art patronage--History--To 1500.
Sculpture, Italian--Italy--Rome--14th century.
Sculpture, Medieval--Italy--Rome.
Harvard subject headings:
Church architecture--Italy--Rome--14th century.
Church architecture--Italy--Rome.
Sculpture, Italian--Italy--Rome--14th century.
Sculpture, Medieval--Italy--Rome.
Princeton subject headings:
Art--Political aspects--Italy--Rome--History--To 1500.
Papacy--History--1309-1378.
Popes--Art patronage--History--To 1500.
Sculpture, Italian--Italy--Rome--14th century.
Sculpture, Medieval--Italy--Rome.