Columbia subject headings:
Church architecture.
City churches.
Harvard subject headings:
Catholic church buildings--Europe--Congresses.
Church architecture--Europe--History--20th century--Congresses.
City churches--Europe--Congresses.
Liturgy and architecture--Europe--Congresses.
Vatican Council (2nd : 1962-1965 : Basilica di San Pietro in Vaticano)
Princeton subject headings: