After the razing of Hammaburg, as a consequence of the Viking attack in 845, the derelict castle area was settled with houses. Archaeologists could find only a few traces of settlement. With the exception of one house with sheeting members, wooden floors and a pit house, remains of houses are only documented by single post-holes and fireplaces. The retrieved pottery shards from the settlement layers include locally produced pottery, imported Slavic pots and so-called shell-tempered round-bottomed pots from the North Sea coast. Even after Count Bernhard left after his castle was destroyed and the missionary Ansgar left after his church burnt down - Hammaburg lived on. The place remained a hub for trans-regional trade.