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Loculus on Trajans column cast at Mainz detail. loculus satchel hung from the canopy of boat Image of part of the cast of Trajans Column at Mainz Erik de Wagt Taken by Erik de Wagt and released into the public domain on his behalf and with his permision by Gaius Cornelius Trajan's Column Castings in Mainz Roman legions Loculus RmischGermanisches