Columbia subject headings:
Sirleto, Guglielmo, 1514-1585--Congresses.
Harvard subject headings:
Sirleto, Guglielmo, 1514-1585--Congresses.
Princeton subject headings:
Catholic Church--Bishops--Biography--Congresses.
Catholic Church--Italy--History--16th century--Congresses.
Conference papers and proceedings.
Sirleto, Guglielmo, 1514-1585--Congresses.