Built in 1897, and referred to as the “Big House,” this three-story Victorian mansion was larger than the Governor’s House of the time. Surrounded by a picket fence lined with raspberry bushes, the Residence had two living rooms, five bedrooms, bathrooms, a dining room, nursery, playroom, kitchen, and sewing room. The Residence served as a hotel for visiting dignitaries, financiers, politicians, and mining engineers from around the world. A second-floor bedroom addition was completed in 1913. Like most Treadwell buildings, it was destroyed in the 1926 Douglas/Treadwell fire.