At the end of the 3rd century AD, probably due to Moorish tribe revolts, the Roman administration and army withdrew from the area south of the river’s basin of Loukkos. Volubilis and its region then became independent of Roman authority and the city maintained its importance until the arrival of Islam in the 8th century AD.
Excavations reveal that during the 4th and 5th centuries, the population that occupied Volubilis maintained commercial relations with the Mediterranean world. Moreover, it lived in the same way as did the city during Roman times, probably keeping municipal institutions of the imperial period in the management of the city. Latin and Hebrew inscriptions attest to the presence of Christian and Jewish populations in the city during this time.
During the 6th century, the housing area was concentrated, for reasons not yet understood, in the western part of the Roman city. A new wall was built to defend the eastern side of the new city. The necropolis of the new town which shows a Christianized population grew around the Triumphal Arch area.