Columbia subject headings:
Papal States--Foreign relations--Italy--Spoleto.
Papal States--History--1309-1417.
Spoleto (Italy)--Foreign relations--Italy--Papal States.
Spoleto (Italy)--History.
Harvard subject headings:
Papal States--Foreign relations--Italy--Spoleto.
Papal States--Foreign relations--Spoleto.
Papal States--History--1309-1417.
Spoleto (Italy)--Foreign relations--Italy--Papal States.
Spoleto (Italy)--History.
Princeton subject headings:
Papal States--Foreign relations--Italy--Spoleto.
Papal States--History--1309-1417.
Spoleto (Italy)--Foreign relations--Italy--Papal States.
Spoleto (Italy)--History.