1. Short title This Act may be cited as the Cahokia Mounds Mississippian Culture Study Act . 2. Findings Congress finds that— (1) the city of Cahokia— (A) was inhabited from approximately A.D. 700 to 1400; and (B) at its peak from A.D. 1050 to 1200— (i) covered nearly 6 square miles; and (ii) was home to 10,000 to 20,000 people; (2) more than 120 mounds were built over time at the site of the city of Cahokia; (3) the site of the city of Cahokia is named for the Cahokia subtribe of the Illinois Confederation, who moved into the area in the 1600s; (4) the city of Cahokia was the central hub and largest city of the Mississippian culture that ruled and traded across half of North America, more than 1,250,000 square miles; (5) the city of Cahokia— (A) was the first known organized urbanization and government north of Mexico; and (B) at its peak, was larger than most European cities, including London; (6) some of the Cahokia Mounds, which were built from A.D. 900 to 1400, still stand as earthen monuments and remnants of Mississippian culture, which is the greatest prehistoric ancient culture in North America, the people of which are ancestors to many of today's First People and Nations; and (7) the Cahokia Mounds are designated as— (A) a National Historic Landmark; (B) an Illinois State Historic Site; and (C) a United Nations Educational, Scientific, and Cultural Organization World Heritage Site. 3. Definitions In this Act: (1) Secretary The term Secretary means the Secretary of the Interior. (2) Study area The term Study Area means— (A) the Cahokia Mounds site; (B) land in Collinsville and Monroe, Madison, and St. Clair Counties, Illinois, and St. Louis County, Missouri, surrounding the Cahokia Mounds site; (C) satellite sites thematically connected to the Cahokia Mounds site