Columbia subject headings:
Perugia (Italy)--History--Pictorial works.
Perugia (Italy)--Pictorial works.
Harvard subject headings:
Perugia (Italy)--History--Pictorial works.
Perugia (Italy)--Pictorial works.
Princeton subject headings:
Perugia (Italy)--Description--Views.
Perugia (Italy)--History--Pictorial works.