Columbia subject headings:
Harvard subject headings:
Architecture, Roman--Greece--Peloponnesus (Peninsula)
Building--Greece.
Building--Rome.
Vaults (Architecture)--Greece--Peloponnesus (Peninsula)
Vaults (Architecture)--Rome.
Princeton subject headings:
Architecture, Roman--Greece.
Peloponnesus (Greece : Peninsula)--Antiquities.
Vaults (Architecture)--Rome--Design and construction--History--To 1500.