During this period, Tipasa played the role of a maritime port of call, a place for commercial exchanges with the indigenous population. The Vandal invasion of the 430's did not mark the definitive end of prosperity of Tipasa, but the town, reconquered by the Byzantines in 531, gradually fell into decline from the 6th century. Criterion (iii): Tipasa bears exceptional testimony to the Punic and Roman civilizations now disappeared. Criterion (iv): The architectural and archaeological vestiges of Tipasa reflect in a significant manner the contacts between the indigenous civilizations and the Punic and Roman waves of colonization between the 6th century B.C. A new establishment, the Office of Management and Exploitation of Cultural Properties, in coordination with the Directorate for Culture of the Wilaya (province) now manages the archaeological sites of Tipasa.