The organized layout of Cahokia - line map of celestial orientations from Monks Mound and Mound 72.

Rolingson, M.A. 1996. Elements of Community Design at Cahokia. In The Ancient Skies and Sky Watchers of Cahokia: woodhenges, Eclipses, and Cahokian Cosmology. Wisconsin Archaeologist. 77(3/4):84-96. Fig. 7.4, p.89

Image courtesy of The Wisconsin Archaeologist.