Pedro Duque Cornejo
A Son is Prophesied to Abraham and Sarah

Choir stalls, Cáceres Cathedral, Cáceres, Spain

The episode (from Genesis 18:1-15) can be identified by the oak tree in the background and the couple's evident age. But why is only one angel represented?

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More of The Hospitality of Abraham
More of Abraham

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