On the southeast corner of Main and Chestnut Streets is the oldest standing residence in the National Historic District, the Baca House, which is now part of the Colorado Historical Society’s museum complex that encompasses the entire block. The unusual two-story adobe was built in 1870 by John S. Hough, a mid-westerner who somehow stumbled on the style later known as Territorial. A merchant and mill owner, Hough moved away about a year after building the house and sold it to Felipe Baca, one of the town’s original settlers, whose family occupied the house into the 1930s. The museum guides give a much better, more detailed description of the house and of the Bloom Mansion on the far end of the block than we can do here. The museum entrance is in the street-level building in the middle of the block on Chestnut Street.