The decoration of a lunette discovered in the Duomo of Pistoia in the 1950s, which represents Christ blessing and Saints James and John, all bust-length, constitutes a more remarkable and stylistically more advanced approach to painting.
a crescent-shaped recess or void in the space above a window or door
الواصلة
a crescent-shaped re-cess or void in the space a-bove a win-dow or door