Puebloans - Aztec Regional System

State · 1152–1304 CE · at its largest around 1152 CE

Ancestral Puebloan settlement network in the San Juan basin of the American Southwest, centred on the great houses at Aztec Ruins (unrelated to the Aztecs), which succeeded the Chaco system.

On its lands while it lasted

Ancestral Puebloans (c. 1,500 BCE – c. 1300 CE): Culture of the Four Corners region that built pueblos and cliff dwellings; ancestors of today's Pueblo peoples, they left the region by about 1300.
Cliff Palace (c. 1190 CE): Largest cliff dwelling in North America, built by Ancestral Puebloans in an alcove at Mesa Verde, Colorado.