Cahokia Mounds
Built 1050. Added to the National Register in 1966, and a National Historic Landmark.

The record
| Property type | Site |
| Address | 7850 Collinsville Rd., Cahokia Mounds State Park, Collinsville, IL |
| County | St. Clair County |
| Listed | Oct 15, 1966 |
| Listed for | Prehistoric archaeology |
| Level of significance | National |
| Also known as | Monks Mounds |
| Reference number | 66000899 |
| Built | 1050 |
| Designations | World Heritage Site, National Historic Landmark |
The nomination form, the document that argues why this place matters, is in the National Archives: Read the nomination ↗
Visiting
| Address | 7850 Collinsville Rd., Cahokia Mounds State Park, Collinsville, IL |
| Coordinates | 38.6539° N, 90.0644° W · Directions ↗ |
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Reference
Questions people ask
When was Cahokia Mounds listed on the National Register?
Oct 15, 1966. It is also a National Historic Landmark, the higher of the two designations.
Source: National Park Service
When was Cahokia Mounds built?
1050.
Source: Wikidata
Where is Cahokia Mounds?
7850 Collinsville Rd., Cahokia Mounds State Park, Collinsville, St. Clair County, Illinois.
Source: National Park Service
Where is the nomination form for Cahokia Mounds?
The National Archives holds the nomination form, the document that made the case for listing.
Source: National Archives
Sources
Name, location, type and dates come from the National Register office's spreadsheet of listed properties, because the Park Service's spatial data does not carry this listing. The map point comes from Wikidata. Construction date, architect, style, photograph and encyclopedia link come from Wikidata and Wikimedia Commons, matched on reference number 66000899. Nothing here is transcribed by hand. The nomination form and photographs ↗ at NPGallery are the original nomination as filed with the National Park Service, and the form is often the best description of the place.