Complex sentence: It currently serves as the headquarters of the Marengo County Historical Society and also houses history exhibits and the works of Geneva Mercer, a Marengo County native who gained fame as an artist and sculptor.
Split into simpler sentences: It currently serves as the headquarters of the Marengo County Historical Society. This museum houses history exhibits and works of Geneva Mercer, a Marengo County native who gained fame as an artist and sculptor.