Columbia subject headings:
Middle Ages.
Pisa (Italy)--History.
Tuscany (Italy)--History.
Violante, Cinzio.
Harvard subject headings:
Middle Ages.
Pisa (Italy)--History.
Tuscany (Italy)--History.
Violante, Cinzio.
Princeton subject headings:
Pisa (Italy)--History.
Tuscany (Italy)--History.