Columbia subject headings:
Convento di San Sisto (Rome, Italy)--History--Sources.
Rome (Italy)--Church history--Sources.
Harvard subject headings:
Convento di San Sisto (Rome, Italy)--History--Sources.
Monasticism and religious orders--Italy--Rome--History--Middle Ages, 600-1500--Sources.
Rome (Italy)--Church history--Sources.
Princeton subject headings:
Convento di San Sisto (Rome, Italy)--History--Sources.
Rome (Italy)--Church history--Sources.