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Halifax, Nova Scotia, had five towers, the oldest of which, the Prince of Wales Tower located in Point Pleasant Park, is the oldest Martello-style tower in North America. It was built in 1796 and was used as a redoubt and a powder magazine. Restored, it is now a National Heritage site. The Duke of York Martello Tower was built in 1798 at York Redoubt. Its lower level still stands, though it has been boarded up for conservation purposes. The Duke of Clarence Martello Tower stood on the Dartmouth shore. Sherbrooke Martello Tower stood opposite York Redoubt on McNabs Island; it was demolished in 1944 and replaced by a concrete lighthouse at Maughers Beach. Another Martello tower stood on Georges Island.