The University of South Dakota (USD) is a public research university in Vermillion, South Dakota, United States. Established by the Dakota Territory legislature in 1862, 27 years before the establishment of the state of South Dakota, USD is the flagship university of South Dakota and the state's oldest public university. It occupies a 274 acres (1.11 km2) campus located in southeastern South Dakota, approximately 63 miles (101 km) south of Sioux Falls, 39 miles (63 km) northwest of Sioux City, Iowa, and north of the Missouri River. The university is home to South Dakota's only medical school and law school. It is also home to the National Music Museum, with over 15,000 American, European, and non-Western instruments.