Minnesota constitution
Article XIII
Section 10

The seat of government of the state is in the city of St. Paul. The legislature may provide by law for a change of the seat of government by a vote of the people, or may locate the same upon the land granted by Congress for a seat of government. If the seat of government is changed, the capitol building and grounds shall be dedicated to an institution for the promotion of science, literature and the arts to be organized by the legislature of the state. The Minnesota Historical Society shall always be a department of this institution.