Columbia subject headings:
Aragon (Spain)--Church history.
Christian antiquities--Spain--Aragon.
Harvard subject headings:
Aragon (Spain)--Church history.
Architecture, Early Christian--Spain--Aragon.
Art, Early Christian--Spain--Aragon.
Christian antiquities--Spain--Aragon.
Christian art and symbolism--Spain--Aragon--To 500.
Church history--Primitive and early church, ca. 30-600
Excavations (Archaeology)--Spain--Aragon.
Princeton subject headings:
Architecture, Early Christian--Spain--Aragon.
Art, Early Christian--Spain--Aragon.
Christian art and symbolism--Spain--Aragon--To 500.