Dome of the Galla Placidia Mausoleum: Detail, the lion of St. Mark
Mausoleum of Galla Placidia, Ravenna, Italy
Symbols of the evangelists are placed at the four corners of the dome support. St. Mark is represented as usual by the winged lion.
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Photographed at the site by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.