Mosaico
Mosaico is a surface made of small stone or glass tesserae. Rome shows both the black-and-white floor mosaics of the Baths of Caracalla and Ostia and the glass mosaics inside St Peter's dome.
Example
The dome of St Peter's carries no paintings at all: what looks like painting from the floor is mosaic, seen up close on the cupola climb.
Sources: cultura.gov.it
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