More information can be found on the Martello Tower page. The Duke of Clarence Martello Tower stood on the Dartmouth shore. It is arguable as to whether one should properly call it a Martello Tower. The Duke of York Martello Tower was built in 1798 at York Redoubt. Another Martello tower stood on Georges Island. There are also the remains of the Martello Tower built during the Napoleonic Wars. Guided tours of the island, including the Martello tower are at an additional cost. It is square rather than round, unlike the traditional Martello tower. The original plan was to build a Martello tower on the island. He also has a Martello tower house in Malahide, Dublin. The town's Martello Tower is a landmark mentioned. Like many of Dublin's coastal settlements, Portmarnock is home to a Napoleonic Martello tower. The Martello Tower is used as an art space. There is a Martello tower located at what was Fort Nugent. Its historic buildings include a 16th-century moot hall and a Napoleonic-era Martello Tower.