Ripuarian Franks
Roman civil administration in Aachen eventually broke down as the baths and other public buildings (along with most of the villae rusticae of the surrounding countryside) were destroyed around AD 375 at the start of the migration period. The last Roman coin finds are from the time of Emperor Gratian (AD 375-383). Rome withdrew its troops from the area, but the town remained populated. By 470, the town came to be ruled by the Ripuarian Franks and subordinated to their capital, Cologne.