Columbia subject headings:
Harvard subject headings:
Aragon family
Avola (Italy)--Church history.
Avola (Italy)--History.
Feudalism--Italy--Avola--History.
Monasticism and religious orders--Italy--Avola--History.
Princeton subject headings:
Aragon family.
Avola (Italy)--Church history.
Avola (Italy)--History.
Feudalism--Italy--Avola--History.
Monasticism and religious orders--Italy--Avola--History.