The Original Governor's Mansion is a well-preserved 1888 Queen Anne house that served as the official residence of Montana's governors from 1913 to 1959. Built for a Helena businessman during the height of the gold-rush prosperity, it was purchased by the state when the capital needed a proper executive mansion. The building is a showpiece of late-Victorian domestic architecture: asymmetrical massing, wraparound porch, steeply pitched roof, decorative shingles, and the general exuberance that the Queen Anne style permitted its practitioners.
The mansion is now managed by the Montana Historical Society and open for guided tours. The interior has been restored to reflect different periods of its history as a governor's residence, and the guides tend to be knowledgeable about both the architecture and the political figures who lived there. Tours run on a set schedule; check current hours before visiting. It's a compact stop — most tours run under an hour — but it gives a good sense of what Helena's elite aspired to in the years when this was one of the wealthiest cities in the West.