Emerita Augusta on the Guadiana River near its confluence with the Albarregas River, was founded in 25 BC by Augustus' "legatus pro praetore" for Hispania Lusitania, Publius Carisius, as a settlement of "emeriti" (veterans) of the V Alaudae and X Gemina Legions. It immediately became the capital of Hispania Lusitania. The activity of Emerita as an Imperial mint was limited to the early years of Augustus' reign, probably from about 25 BC until 19 BC at the latest. It early became a Christian center, with its own bishop by 250. The city was lost to the Visigoths about 411. Considerable portions of the Roman city are still standing including a bridge over the Guadiana, parts of the aqueduct, a triumphal arch of Trajan, the amphitheater which held 15,000, and the circus.