The Brimstone Hill Fortress is located on the island of St. Kitts in the Federation of St. Christopher (St. Kitts) and Nevis in the Eastern Caribbean. The Fortress, constructed intermittently between the 1690s and 1790s, is of singular importance as being the remains of a large, complete military community of the 18th century. As such, it is a veritable time capsule of international significance.