XIR323090 Melchisedech offers Bread at the Altar, detail of the lunette on the South wall depicting the offerings of Abel and Melchisedech (mosaic) by Byzantine School, (6th century); San Vitale, Ravenna, Italy; (add.info.: Melchisedek was the priest and king who offered bread and wine to Abraham in Genesis; he is held in traditional Catholic and Christian doctrine to prefigure the sacrifice of Jesus Christ; Salem has been identified with Jerusalem;); out of copyright.