was designed by the famous New York City architect Henry Janeway Hardenbergh, who also designed the original Waldorf-Astoria, Plaza Hotel, The Dakota, Willard Hotel, and Fairmont Copley Plaza. In 1986 the Billings Preservation Society, a non-profit organization, obtained proprietorship of the Moss Mansion through a lease agreement with the family and separate option agreement. The museum is self-funded through tours, events and weddings, annual fundraisers, memberships, and donations. References External links Moss Mansion entry - Billings Gazette Moss Mansion staircase - Billings Gazette Moss Mansion kitchen - Billings Gazette Moss Mansion dining room - Billings Gazette Houses on the National Register of Historic Places in Montana Houses completed in 1903 Historic house museums in Montana Museums in Billings, Montana Houses in Yellowstone County, Montana National Register of Historic Places in Yellowstone County, Montana 1903 establishments in Montana Renaissance Revival architecture in Montana