Columbia subject headings:
Crusades--Influence--Congresses.
East and West--Congresses.
Harvard subject headings:
Art, Byzantine--Congresses.
Art, Medieval--Congresses
Crusades--Influence--Congresses.
East and West--Congresses
Islamic art--Congresses.
Princeton subject headings:
Crusades--Influence--Congresses.
East and West--Congresses.