Columbia subject headings:
Architecture, Medieval--Congresses.
Decoration and ornament, Architectural--Congresses.
Decoration and ornament, Medieval--Congresses.
Harvard subject headings:
Architecture, Medieval--Congresses
Decoration and ornament, Architectural--Congresses.
Decoration and ornament, Medieval--Congresses.
Princeton subject headings:
Architectural models.
Architecture, Medieval--Designs and plans.
Art objects, Medieval.
Miniature objects.