Mission San Luis is a history museum in Tallahassee, Florida that focuses on the Apalachee Indians and Spanish colonial history. The document discusses some of the impressive structures that were present at Mission San Luis during the 1500s-1600s, including the plaza, council house, and church. The plaza was located at the center of the compound and was used for trading, socializing, and playing games. The council house was the largest Indian structure in southern United States, holding up to 3,000 people for community and religious events. The church was the most important building and was used for religious services and ceremonies.