WoodhengeWoodhenge is a circle of wooden posts that were used to mark equinoxes and solstices in about 900 AD to 1100 AD. Built by the Mississippian Indians, these structures are undoubtedly remarkable. There are at least 5 circles of posts in the Cahokia Mounds area.
The original Woodhenge circle was 410 ft. in diameter, 1,495 ft. and 4 in. in circumference, and had 48 posts. Post pits average 7 feet deep and just over two feet wide.
The first Woodhenge was partially excavated by Warren Wittry and a crew of archaeologists. Wittry named the circle of wooden posts "Woodhenge" because of its related functions to Stonehenge in England. Fragments of wood remaining in some of the post pits contained red cedar, showing that the poles were made of this "sacred wood". 40 of the posts have been modernly reconstructed.
Only three posts in the Woodhenge circle are crucial as seasonal markers; those denoting the first days of winter and summer (the solstices) and the one between marking the first days of spring and fall (the equinoxes). One could tell when these events occurred by viewing the poles from the center of the circle.
Although we know much about these extraordinary structures, weathering and construction have damaged a lot of archaeological evidence. We may never understand the true and completed secrets to Woodhenge.