Columbia subject headings:
Crusades in art.
Mosaics, Medieval--Italy--Vercelli.
Pavements, Mosaic--Italy--Vercelli.
S. Maria Maggiore (Church : Vercelli, Italy)
Harvard subject headings:
Crusades in art.
Mosaics, Medieval--Italy--Vercelli.
Pavements, Mosaic--Italy--Vercelli.
S. Maria Maggiore (Church : Vercelli, Italy)
Princeton subject headings: