The Thaddeus Clapp House, a historic building in Pittsfield, MA, is rumored to be haunted by the figure of a woman, often presumed to be Mrs. Clapp. Guests at the former bed and breakfast have reported seeing her figure drift through the house, and the building has a reputation for being a spirited environment, though the nature of these occurrences is not detailed in the provided results. The primary reported phenomenon is the apparition of a woman's figure. Many assume this to be Mrs. Clapp, though this is a belief rather than a confirmed identity. The house is described as having a "spirited environment," suggesting a general presence of supernatural activity. The Thaddeus Clapp House was originally a private residence for Thaddeus Clapp, a prominent businessman. It was later converted into an apartment building and has also served as a bed and breakfast.