 The ancestors of the Muscogee people were part of the Mississippian Ideological Interaction Sphere, who between AD 800 and AD 1600 built complex cities and surrounding networks of satellite towns (suburbs) centered around massive earthwork mounds, some of which had physical footprints larger than the Egyptian pyramids.Some Mississippian city populations may have been larger than later colonial European-American cities.Muscogee Creeks are associated with multi-mound centers such as the Ocmulgee, Etowah Indian Mounds, and Moundville sites.