Columbia subject headings:
Ceilings--Congresses.
Mural painting and decoration, Ancient--Congresses.
Mural painting and decoration, Roman--Congresses.
Vaults (Architecture)--Congresses.
Harvard subject headings:
Mural painting and decoration, Ancient--Congresses.
Mural painting and decoration, Roman--Congresses.
Princeton subject headings:
Ceilings--Congresses.
Mural painting and decoration, Ancient--Congresses.
Mural painting and decoration, Roman--Congresses.
Vaults (Architecture)--Congresses.