As of the 17th century, Tennessee was the middle ground for several different native peoples. Along the Mississippi River was the Chickasaw & Choctaw peoples, and inland of them were the Coushatta-- all three were part of the Muskogean language family. Before European contact, they were supposedly all a loose collection of Mississippian culture city-states with their own leaders, but upon contact with Europeans, they merged into larger nations, spread out and adopted a European lifestyle, earning many of them the title of the "Civilized Tribes." During the height of the Mississippians, hundreds of walled cities extended throughout the American south from Louisiana to the east coast, up the Mississippi into Wisconsin & a few fringe cities along larger rivers on the Great Plains. They had complex society & agriculture. They did not build with stone, but made plenty of examples of sculpture work in clay, stone & copper. Most of what remains of these cities, however, are large, pyramidal, earthen hills (upon which chiefs & upper-classmen would build their homes) and artful burial mounds. These people did not develop the Mississippian culture, however, but adopted it from the Caddo people west of the Mississippi River.