The Gibraltar Point Lighthouse is a lighthouse located on the Toronto Islands in Toronto, Ontario, Canada. Begun in 1808, it is the oldest existing lighthouse on the Great Lakes, and one of Toronto's oldest buildings. The lighthouse is perhaps best known for the demise of its first keeper, German-born John Paul Radelmüller, whose 1815 murder forms the basis of Toronto's most enduring ghost story. Recent research has verified many aspects of the traditional tale of his death and identified the soldiers charged with but ultimately acquitted of the crime. History Authorized in 1803 with two other lighthouses by an Act of the Legislative Assembly of Upper Canada, construction of the Gibraltar Point lighthouse did not begin until 1808. It was built to a height of and extended to in 1832. The diameter ranges from about at the base to about at the top. The base is made from stone quarried in Queenston and the extension from Kingston stone. The lighthouse construction and maintenance was paid for through a harbour fee levied upon all boats entering the harbour. When completed in August 1809, the lighthouse was located from the shore. Since then, sand has built up over time so that it now stands about inland. When opened, the lighthouse was accompanied by the lighthouse keeper's cottage. It was a squared-log house clad in clapboard. It was two-stories, having two rooms on the first floor and sleeping space in the attic above. When ships approached, the lighthouse keeper would run up a flag to notify the Toronto harbour master. The cottage no longer exists. The tower light was initially an oak and glass cage, illuminated by candles. The tower switched to sperm oil from 1832 and switched to coal in 1863. The original lamp structure was wood and replaced with steel in 1878. An electric light was installed in 1916-17 and updated in 1945. In 1958, Metro Parks took over operations and made renovations in 1961-62. Currently unused, the lighthouse is occasionally open for public tours, including on the annual Doors Open Toronto weekend. Since the decommissioning of the lighthouse, smaller automated lighthouses (two located at Humber Bay Park in the west and Bluffer's Park to the east), Toronto Harbour Light, as well as floating bell or light buoys, navigational masts have been used to replace the lighthouse to provide navigational aid along Toronto's waterfront and Toronto Harbour. John Paul Radelmüller A