<P> Saints are fairly often seen, with Peter and Paul, both martyred in Rome, by some way the most common in the catacombs there . Both already have their distinctive appearances, retained throughout the history of Christian art . Other saints may not be identifiable unless labelled with an inscription . In the same way some images may represent either the Last Supper or a contemporary agape feast . </P> <Ul> <Li> <P> The Three Youths in the Fiery Furnace (), catacomb of Priscilla </P> </Li> <Li> <P> Moses striking the rock in the desert, a prototype of baptism </P> </Li> <Li> <P> 3rd century cover for catacomb burial, engraved with the Adoration of the Magi (cast shown) </P> </Li> <Li> <P> Catacomb chamber with (from top): Orants, Jonah and the Whale, Moses striking the rock (left), Noah praying in the ark, Adoration of the Magi. 200--250 </P> </Li> </Ul> <Li> <P> The Three Youths in the Fiery Furnace (), catacomb of Priscilla </P> </Li> <P> The Three Youths in the Fiery Furnace (), catacomb of Priscilla </P>

Early christian art of the third century differs from later christian art in what way