Wis. Stat. § 45.06

The action of any county board or municipality, or department thereof, in granting veterans organizations or any other civic, patriotic, educational or historical society, rooms and space within public buildings for the establishment of memorial halls and museums, and occupancy thereof by its members, is authorized and confirmed. Such county board or municipality may permit the use and occupancy of such rooms and space for such term and subject to conditions and provisions as may be imposed by them. Any contract, lien or agreement between said county board, municipality or department thereof and any such organization now in force shall continue in force according to the terms thereof.