Timgad, located to the north of the Aurès massif in a beautiful hilly setting, 480 kilometres south-east of Algiers and 110 kilometres south of Constantine, is a prime example of a Roman military colony established from scratch. Trajan constructed the Colonia Marciana Traiana Thamugadi around 100 A.D., most likely as an encampment for the 3rd Augustan Legion, which was later quartered in Lambaesis. Timgad, with its Roman military camp, model town planning, and unique civic and military architecture, illustrates an important exchange of ideas, technologies, and traditions carried out by Rome's central power throughout the colonization of Antique Algeria's high plains. Further excavations of the city resulted in its designation as a UNESCO World Heritage Site in 1982. Many Timgad remnants still survive today, including its distinctive arch, known as the "Arch of Trajan," and its theatre, which still hosts the occasional concert.