Columbia subject headings:
Mosaics, Ancient--Congresses.
Mosaics, Greco-Roman--Congresses.
Mosaics, Medieval--Congresses.
Pavements, Mosaic--Congresses.
Harvard subject headings:
Mosaics, Ancient--Congresses.
Mosaics, Greco-Roman--Congresses.
Mosaics, Medieval--Congresses.
Pavements, Mosaic--Congresses.
Princeton subject headings:
Mosaics, Ancient--Congresses.
Mosaics, Medieval--Congresses.