Columbia subject headings:
Benedictine architecture--Italy--Marche--History.
Benedictine monasteries--Italy--Marche--History.
Marche (Italy)--Tours.
Harvard subject headings:
Abbeys--Italy--Marche.
Benedictine architecture--Italy--Marche.
Benedictines--Italy--Marche--History.
Church architecture--Italy--Marche.
Marche (Italy)--Buildings, structures, etc.
Marche (Italy)--Church history.
Monasticism and religious orders--Italy--Marche--History.
Princeton subject headings:
Church architecture--Italy--Marche--History.
Church buildings--Italy--Marche--History.
Marche (Italy)--Buildings, structures, etc.