a Dacian nobleman called Bikilis was captured. Decebalus’ treasures had been buried under a temporarily diverted river and the captive workers executed to retain the secret. Staggering amounts of gold and silver were found and packed off to fill Rome's coffers. Trajan built a new city, Colonia Ulpia Traiana Augusta Dacica Sarmizegetusa, on another site (north of the hill citadel holding the previous Dacian capital), although bearing the same full name, Sarmizegetusa. This capital city was conceived as a purely civilian administrative centre and was provided the usual Romanized administrative apparatus (decurions, aediles, etc.). Urban life in Roman Dacia seems to have been restricted to Roman colonists, mostly military veterans; there is no extant evidence for the existence in the province of peregrine cities. Native Dacians continued to live in scattered rural settlements, according to their own ways. In another arrangement with no parallels in any other Roman province, the existing quasi-urban Dacian settlements disappeared after the Roman conquest. A number of unorganized urban settlements (vici) developed around military encampments in Dacia proper – the most important being Apulum – but were only acknowledged as cities proper well after Trajan's reign. The main regional effort of urbanization was concentrated by Trajan at the rearguard, in Moesia, where he created the new cities of Nicopolis ad Istrum and Marcianopolis. A vicus was also created around the Tropaeum Traianum. The garrison city of Oescus received the status of Roman colony after its legionary garrison was redeployed. The fact that these former Danubian outposts had ceased to be frontier bases and were now in the deep rear acted as an inducement to their urbanization and development. Not all of Dacia was permanently occupied. After the post-Trajanic evacuation of lands across the lower Danube, land extending from the Danube to the inner arch of the Carpathian Mountains, including Transylvania, the Metaliferi Mountains and Oltenia was absorbed into the Roman province, which eventually took the form of an "excrescence" with ill-defined limits, stretching from the Danube northwards to the Carpathians. This may have been intended as a basis for further expansion within Eastern Europe, as the Romans believed the region to be much more geographically "flattened", and thus easier to traverse, than it actually was; they also underestimated the distance from those vaguely defined borders to the ocean. Defence of the province was entrusted to a single legion, the XIII Gemina, stationed at Apulum, which