Columbia subject headings:
Friars--Italy--Siena--History.
Siena (Italy)--Church history.
Harvard subject headings:
Augustinians--Italy--Siena--History.
Dominicans--Italy--Siena--History.
Franciscans--Italy--Siena--History.
Friars--Italy--Siena.
Preaching--History--Middle Ages, 600-1500
Preaching--Italy--Siena--History--Middle Ages, 600-1500.
Siena (Italy)--Religious life and customs.
Siena (Italy)--Social conditions.
Princeton subject headings:
Friars--Italy--Siena--History.
Siena (Italy)--Church history--476-1400.