Columbia subject headings:
Harvard subject headings:
Abbadia San Salvatore (Italy)--History--Congresses.
Abbadia San Salvatore (Siena, Italy)--History.
Amiata, Monte, Region (Italy)--History--Congresses.
Siena Region (Italy)--History--Congresses.
Princeton subject headings:
Abbadia San Salvatore (Italy)--History--Congresses.
Abbadia San Salvatore (Siena, Italy)--History--Congresses.
Amiata, Monte, Region (Italy)--Church history--Congresses.
Amiata, Monte, Region (Italy)--History--Congresses.