Timgad or Thamugadi ( Colonia Marciana Traiana Thamugadi in Latin) is an ancient city located in the territory of the eponymous town in Timgad , in the wilaya of Batna in the Aures , in north- eastern Algeria . It was founded by the Roman emperor Trajan in 100 and with the status settlement. This is the last deduction Roman colony in Africa. Built with temples, baths, the forum and its great theater , city, initially with an area of ​​12 hectares, eventually deal over fifty . Given its excellent state of preservation and the fact that the considered typical of a Roman city , Timgad was declared World Heritage Site by UNESCO in 1982. The site , however, raises a conservation number of problems