A bridge was built across the River Nene around AD 65, after which a small settlement grew to the south west of the bridge. This prospered as a market centre for trade along the important Ermine Street, the precursor to the modern A1. The town had walls around it for protection and status, and developed major public buildings where a town council met and organised local government, which had controls over roads, cemeteries, baths, water supply and all aspects of the daily life of the town. Added to the towns market importance was its rich sources of clay and iron which were the key resources of a major pottery and metal working industry. The importance of Durobrivae lies in the fact that although the town walls covered 44 acres, the industrial suburbs extended for another 450 acres making a major settlement in Roman Britain. It remained a prosperous town until the end of Roman occupation of Britain.