Spiro Mounds, near the modern town of …

Years: 1000 - 1011

Spiro Mounds, near the modern town of Spiro in eastern Oklahoma, is the site of a series of twelve earthen burial mounds associated with the Mississippian tradition of the Mound Builders, who begin constructing mounds there in about 1000.

Inhabited from 850, Spiro is the westernmost outpost of the Mississippian culture that has spread along the lower Mississippi drainage area and its tributaries.

The vast Mississippian trading network brings obsidian from Mexico, colored flint from New Mexico, copper from the Great Lakes, mica from the Carolinas, and conch shells from the Gulf Coast.

The engravings of humans, animals, and geometric designs on the conch shells at Spiro are particularly well rendered and undoubtedly had profound symbolic significance.

The Spiro's ceremonial objects are some of the most sophisticated artforms ever found in the Mississippian region.

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