Columbia subject headings:
Mosaics, Ancient--Congresses.
Mosaics, Byzantine--Congresses.
Mosaics, Greek--Congresses.
Mosaics, Medieval--Congresses.
Mosaics, Roman--Congresses.
Harvard subject headings:
Mosaics, Ancient--Congresses.
Mosaics, Byzantine--Congresses.
Mosaics, Greek--Congresses.
Mosaics, Medieval--Congresses.
Mosaics, Roman--Congresses.
Princeton subject headings:
Mosaics, Ancient--Congresses.
Mosaics, Medieval--Congresses.