An Early Iron Age defended settlement of the Lusatian culture of c 550-400 BC, on a former island in Lake Biskupin, northwest Poland. The island site was ringed by a breakwater of piles and fortified by a rampart of timber compartments filled with earth and stones. Inside were more than 100 wooden cabins, which were all erected within a year, arranged along parallel streets made of logs. Up to 1200 people may have been housed there. Workshops for craftsmen in bone, bronze, and horn have been excavated. Waterlogged ground preserved the structures.