The Roman ruins of Volubilis. The Romans developed Volubilis from approximately 25 BC, during the reign of Juba II, a Berber prince appointed as the ruler of the region by the emperor Augustus. Juba II was married to the daughter of Anthony and Cleopatra. The fortifications of Volubilis were erected in approximately 168AD, during the rule of Emperor Marcus Aurelius Antoninus, known as Caracalla. One of the most famous structures at Volubilis is the Triumphal Arch of Caracalla, built for the Roman Emperor upon his death in 217 AD.