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Castletoun (Inglis: Castletown, Manx: Balley Chashtal, pronounced [ˈbalʲə ˈxaʃtʲəl]) is a toun geographically athin the Malew parish o the Isle o Man but administered separately. Lyin at the sooth o the island, it is the umwhile Manx caipital. The centre o toun is dominatit bi Castle Rushen, a well-preserved castle.