 Hungarian archaeologists Laszló Makkai and András Mócsy attribute this culture to an internal evolution of Avars resulting from the integration of the Bulgar émigrés from the previous generation of the 670s.According to Makkai and Mócsy, "the material culture—art, clothing, equipment, weapons—of the late Avar/Bulgar period evolved autonomously from these new foundations".Many regions that had once been important centers of the Avar empire had lost their significance while new ones arose.