In the Middle Ages, there several discoveries were made on the site of the town, for example on the site of the old village of Modestorpe not far from St. John's Church (Johanniskirche), at the Lambertiplatz near the saltworks and in the old Waterside Quarter.
Keskajal tehti linna asupaigas mitu avastust, näiteks vana Modestorpe küla asupaigas, mitte kaugel Ristija Johannese kirikust (Johanniskirche), Lambertiplatzil soolavabriku kõrval ja vanas Veeäärses kvartalis.