Columbia subject headings:
Harvard subject headings:
Abbeys--Italy--Abruzzo.
Abbeys--Italy--Puglia.
Abruzzo (Italy)--Buildings, structures, etc.
Benedictine architecture--Italy--Abruzzo.
Benedictine architecture--Italy--Puglia.
Church architecture--Italy--Abruzzo.
Church architecture--Italy--Puglia.
Puglia (Italy)--Buildings, structures, etc.
Princeton subject headings:
Benedictine monasteries--Italy--Abruzzo--History.
Benedictine monasteries--Italy--Puglia--History.