The All Saints School is a historic private school in Sioux Falls, South Dakota. William Hobart Hare, the first Episcopal bishop of South Dakota, founded the school to serve as a girls' boarding school for the children of Episcopal missionaries. The school's main building, a four-story granite structure with a distinctive bell tower, was built in 1884. A cupola sits atop the building's front entrance; Hare's personal quarters was near the cupola, and he was known to watch the city from the cupola in the evening. A 1+1⁄2-story chapel is located on the west side of the main building.