Article: The Mounds of Cahokia.

The year was 1150. The chief stepped out of his huge thatched house into the chilly dawn air. His 50-foot-tall house was built atop a terraced, flat-topped mound, 100 feet high. The mound covered 14 acres. The chief looked down upon his city of 20,000 people.

Small thatch-roofed houses were in neat rows near the chief's mound and a large central plaza. Pathways connected neighborhoods. markets, and other, smaller plazas. Grain-storage buildings, sweat lodges, and other ceremonial huts were used by different people. Around the center of the city was a two-mile-long wall. 15 feet high. made of nearly 20,000 log poles, if, very 70 feet. there was a watchtower. ...

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