Columbia subject headings:
Harvard subject headings:
Christian antiquities--Italy--Tuscany--Congresses.
Italy--Antiquities--Congresses.
Tuscany (Italy)--Antiquities--Congresses.
Princeton subject headings:
Christian antiquities--Italy--Tuscany--Congresses.
Italy--Antiquities--Congresses.
Tuscany (Italy)--Antiquities--Congresses.