Monks Mound is the largest Pre-Columbian earthwork in the Americas and the largest pyramid north of Mesoamerica. The beginning of its construction dates from 900 to 955 CE. Located at the Cahokia Mounds UNESCO World Heritage Site near Collinsville, Illinois, the mound size was calculated in 1988 as about 100 feet (30 m) high, 955 feet (291 m) long including the access ramp at the southern end, and 775 feet (236 m) wide. This makes Monks Mound roughly the same size at its base as the Great Pyramid of Giza. The perimeter of its base is larger than the Pyramid of the Sun at Teotihuacan. As a platform mound, the earthwork supported a wooden structure on the summit.
Monks Mound in summer. The concrete staircase follows the approximate course of the ancient wooden stairs
Monks Mound from the side showing the 2 terraces.
Looking over the Cahokia Mounds site from the top of Monks Mound
In the history of the Americas, the pre-Columbian era, also known as the pre-contact era, spans from the original peopling of the Americas in the Upper Paleolithic to European colonization, which began with Christopher Columbus's voyage of 1492. Usually, the era covers the history of Indigenous cultures until significant influence by Europeans. This may have occurred decades or even centuries after Columbus for certain cultures.
Artist's reconstruction of Poverty Point, 1500 BCE
Hopewell mounds from the Mound City group in Ohio
Monks Mound of Cahokia (UNESCO World Heritage Site) in summer. The concrete staircase follows the approximate course of the ancient wooden stairs.
An artistic recreation of The Kincaid site from the prehistoric Mississippian culture as it may have looked at its peak 1050–1400 CE
