Columbia subject headings:
Abbeys--Italy.
Benedictines--History.
Harvard subject headings:
Abbeys--Italy--Subiaco.
Benedictines--Italy--History.
Montecassino (Monastery)
Monteoliveto Maggiore (Abbey)
Princeton subject headings:
Abbeys--Italy--Subiaco.
Benedictines--Italy--History.
Montecassino (Monastery)
Monteoliveto Maggiore (Abbey)