Seguin Light, on Seguin Island in the Gulf of Maine near the mouth of the Kennebec River, is Maine’s second-oldest coastal lighthouse, established in 1795 when the area was still part of Massachusetts. Its wood-frame tower of 1797 was replaced in 1820 and again in 1857 by the present granite tower, whose light stands 180 feet above mean sea level, the highest of any lighthouse in Maine. The station also contains Maine’s only first-order Fresnel lens and several historic support buildings. After nearly two centuries of resident keepers, it was automated in 1985 and continues seasonally as a museum property and prominent historic coastal light.