Mill City Museum is located in the ruins of the Washburn "A" Mill next to Mill Ruins Park on the banks of the Mississippi River in Minneapolis. The museum, an entity of the Minnesota Historical Society that opened in 2003, focuses on the founding and growth of Minneapolis, especially flour milling and the other industries that used hydropower from Saint Anthony Falls. The mill complex that the museum is within, dates from the 1870s and is listed on the National Register of Historic Places.