The Chantry Island Lighthouse, officially known as Chantry Island Lightstation Tower, is a lightstation on Chantry Island, off the coast of Southampton, Ontario in Lake Huron. It was constructed in the years 1855 through to 1859, by John Brown of Thorold, Ontario, under the authority of the Province of Canada and is recognized as one of the six Imperial Towers. Virtually identical, they were completed in 1858-1859 on Lake Huron and Georgian Bay and are among the few lighthouses on the Great Lakes made of cut limestone and granite (not brick, metal, wood or concrete).