Cesare Nebbia, The Coronation of the Virgin

West façade, Orvieto Cathedral

This mosaic tops the center of the cathedral's façade. Below it is a rose window, and below that is a similarly triangular mosaic of the Assumption (which see).

This image in full resolution
More of the Coronation of the Virgin

Photographed at the cathedral by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.