Carlo Pellicani, after Carlo Buzzi, Abraham and Isaac

West façade, Milan Cathedral

As usual, the image pictures the details from Genesis 22:4-8 — the altar, the wood, Isaac trussed, the interceding angel, and Abraham with this sword. Differences: The sword is already broken, God is not directly in evidence, and the altar is a simple construction of unhewn stone (viz. God's instructions in Exodus 20:25) rather than the Christian-style altars seen in many medieval examples.

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