Answer:

frescos

AnswerCrossword Clue
FRESCOSSome Raphael masterpieces
FRESCOSPaintings on wet plaster
FRESCOSPlaster murals.
FRESCOSWater color designs on wet plaster.
FRESCOSMichelangelo works
FRESCOSSome Diego Rivera works
FRESCOSMurals on plaster