In Cromwell, the Middletown Upper Houses Historic District was designated part of the National Register of Historic Places on July 27, 1979.
National Register of Historic Places | Südoststeiermark District | Upper Austria | National Trust for Places of Historic Interest or Natural Beauty | district | Eichsfeld (district) | Darjeeling district | Hartberg (district) | Bad Kreuznach (district) | Upper Canada | Lake District | school district | Hildesheim (district) | District of Columbia | United States District Court for the Southern District of New York | historic district | National Historic Landmark | Reutte (district) | Peak District | Leibnitz (district) | Perg (district) | electoral district | Upper Silesia | District | central business district | Neuwied (district) | Murau (district) | Bludenz (district) | Upper West Side | Upper Egypt |