St. Stephen

5th century
Fresco
Basilica of St. Paul Outside the Walls

This early portrait of St. Stephen has no reference to the story of the gridiron. The fresco cannot be earlier than the 5th century, when deacons were first required to be tonsured.

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Source: Photographed at the basilica by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.