Columbia subject headings:
Cities and towns--Religious aspects--Christianity.
City and town life.
Harvard subject headings:
Architecture, Early Christian.
Buildings--Remodeling for other use--Rome.
Cities and towns, Ancient
Cities and towns--Religious aspects--Christianity
Sacred space--Rome.
Princeton subject headings:
Architecture, Roman--Congresses.
Christianity and culture--History--Early church, ca. 30-600--Congresses.
Christianity and culture--Rome--Congresses.
Cities and towns--Religious aspects--Christianity--Congresses.
Cities and towns--Rome--Congresses.
Sacred space--Rome--Congresses.