Landskrona is a late medieval town located at the shores of Øresund, founded at the location of the former Danish fishing village Sønder Sæby in the province of Scania by king Erik VII of Pomerania early in the 15th century. In 1720 the town, like its province, became a formal part of Sweden. Around the Castle build by Danish king Christian III in 1549, Landskrona Citadel, a huge system of moats emerged over the centuries, also in the town's Swedish history.