Columbia subject headings:
Harvard subject headings:
Doorways--Italy--Perugia.
Palazzo dei Priori (Perugia, Italy)
Sculpture, Italian--Italy--Perugia.
Sculpture, Medieval--Italy--Perugia.
Sculpture--Italy--Perugia.
Princeton subject headings:
Architecture, Gothic--Italy--Perugia.
Architecture--Conservation and restoration--Italy--Perugia.
Palazzo dei Priori (Perugia, Italy)
Perugia (Italy)--Buildings, structures, etc.
Relief (Sculpture), Gothic--Conservation and restoration--Italy--Perugia.
Relief (Sculpture), Gothic--Italy--Perugia.