St. Paul as Martyr
Pio-Christian Museum, The Vatican, Inventory # 31524 ex 170A
This bust of Paul is quite unusual. It is the only one I know of from the 4th century that gives the saint a full head of hair. Also, he holds a wreath that normally signifies martyrdom. Although Paul was indeed a martyr, it is not common to give him any attribute referring to this fact.
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Photographed at the museum by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.