Muiden Castle (Dutch: Muiderslot, Dutch pronunciation: [ˌmœydərˈslɔt]) is a castle in the Netherlands, located at the mouth of the Vecht river, some 15 kilometers southeast of Amsterdam, in Muiden, where it flows into what used to be the Zuiderzee. It is one of the better known castles in the Netherlands and featured in many television shows set in the Middle Ages.