The three lands of Denmark historically formed the Danish kingdom from its unification and consolidation in the 10th century until the 17th century:Zealand (Sjælland) and the islands south of it, with Roskilde as a centre Jutland (Jylland), the western peninsula, with Viborg as a centre and the island of Fyn. Scania (Skåneland) on the Scandinavian Peninsula, with Lund as a centre