Cain Slays Abel
Cathedral of the Assumption, Monreale, Sicily
Cain kills Abel with a bludgeon (Genesis 4:8). The mosaicist goes so far as to show Abel's blood – a touch of realism perhaps, but also consistent with the typological interpretation of Abel as a type of Christ, whose shed blood saves the world.
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Photographed at the cathedral by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.