The Martyrdom of Saints Gervasius and Protasius
Church of San Trovaso, Venice
An angel sweeps in from above with palms of martyrdom for the two men. In the Golden Legend Gervasius is whipped to death and Protasius beheaded, but here it is not clear by what means they are being executed.
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Photographed at the site by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.