Columbia subject headings:
Architectural drawing--Research--Congresses.
Architecture, Ancient--Research--Congresses.
Architecture, Early Christian--Research--Congresses.
Harvard subject headings:
Architectural drawing--Research--Congresses.
Architecture, Ancient--Research--Congresses.
Architecture, Early Christian--Research--Congresses.
Princeton subject headings:
Architecture, Ancient--Designs and plans--Congresses.
Architecture, Classical--Designs and plans--Congresses.