Columbia subject headings:
Phrygia--Antiquities.
Turkey--Antiquities, Roman.
Turkey--Antiquities.
Harvard subject headings:
Cave churches--Turkey.
Christianity--Turkey--History.
Church history--Primitive and early church, ca. 30-600
Montanism.
Phrygia--Antiquities.
Turkey--Antiquities, Roman.
Turkey--Antiquities.
Princeton subject headings:
Phrygia--Antiquities.
Turkey--Antiquities, Roman.
Turkey--Antiquities.