Cao's Courtyard, also known as Sanduotang, is a traditional residential building in the style of the Ming and Qing dynasties. It is located in Beiguang Village, 5 kilometers southwest of Taigu County, Shanxi Province, and is adjacent to National Highway 108.
Cao's Courtyard is a house of the Cao family, a wealthy Shanxi merchant in the Ming and Qing dynasties. Cao's Courtyard covers an area of 10,600 square meters (2014), and the overall layout is in the shape of a "longevity" character. It is known as "the wonder of Chinese folk houses". In 1999, it was opened as the Sanduotang Museum. Taigu Cao's Courtyard Museum has 277 houses and has a history of more than 400 years.