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(Δίερνα; Díerna). Originally a Dacian settlement, Romanized since Trajan, modern Orşova in Banat/Romania. Supposedly already a colonia iuris Italici in Trajan's time (Ulpianus in Dig. 50,15,1,8) and a municipium in the Severian period (CIL III 14468). D. was located on the Danube west of Drobeta and was the starting point of the rural road to Tibiscum and Sarmizegetusa. A ports, toll station and brick production were located nearby. The military garrison was supplied by the cohors I Brittonum miliaria,…