Complex sentence: Historic St. Mary's City, which sits next to the college, is a State-run archeological research, historic preservation and interpretation center and indoor and outdoor museum complex, including a reconstructed colonial town, located on the historic site of Maryland's first colony.
Split into simpler sentences: Historic St. Mary's City, which sits next to the college, is a State-run archeological research, historic preservation and interpretation center and an indoor and outdoor museum complex. The area managed by the commission also includes a reconstructed colonial town, located on the historic site of Maryland's first colony.