Founded in 1893 by the Free Christian Church, Horsham Museum Society used to hold quarterly meetings and evening entertainments during which members would exhibit interesting and unusual items. In time the collection grew so large that by 1928 the Museum Society wanted a permanent home. It was given the basement of Park House on North Street in which to exhibit displays, which building had just been acquired as council offices. In 1941 the Museum moved to its current location in Causeway House, on Horsham's historic Causeway. Today the Museum is part of Horsham District Council.