Columbia subject headings:
Mosaics--Technique.
Mural painting and decoration--Technique.
Harvard subject headings:
Mosaics--History.
Mural painting and decoration--Conservation and restoration--History.
Mural painting and decoration--History.
Princeton subject headings:
Mosaics--History.
Mural painting and decoration--Conservation and restoration--History.
Mural painting and decoration--History.