Columbia subject headings:
Hospitalers--Italy--Sicily.
Military religious orders--Italy--Sicily--History.
Templars--Italy--Sicily--History.
Harvard subject headings:
Hospitalers--Italy--Sicily--History.
Military religious orders--Italy--History.
Sicily (Italy)--History--1282-1409
Sicily (Italy)--History--15th-18th centuries
Templars--Italy--Sicily--History.
Princeton subject headings: