Mound 55

Excavations into Mound 55, also called Murdock Mound, took place in 1941, when about nine feet of the mound still remained after it had been plowed over. Several pre-mound structures were found, including a larger circular building and a rare cross-shaped building, showing this area had ritual use before the mound was built. The mound was built in several stages, with a lower terrace extending toward the Grand Plaza, a building on the summit, and fences around the edges. It was coated with black clay, could have been as much as 30 feet tall, and has been reconstructed in its original location.

Collinsville, Illinois · United States