Historic Cahokia Courthouse in Zip Code 62206

Historic Cahokia Courthouse

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Historic Cahokia Courthouse

Historic Cahokia Courthouse
107 Elm Street
Cahokia, IL 62206
618-332-1782

The Cahokia Courthouse is located in the Colonial Cahokia State Historic Site complex and is on the National Register of Historic Places . It was built in 1740, originally as a residence, during the time period when Illinois was a French colony. In 1793, the building was purchased by the Common Pleas Court of the United States Northwest Territory and used to handle any territorial, political or legal issue. It is an example of the French Creole architecture known as poteaux-sur-solle (post-on-sill) construction. It is important in that it is one of only thirty such constructed buildings that are left in the United States. Poles are placed vertically along a horizontal log and then the spaces are filled in with stone and mortar chinking. The Cahokia Courthouse is also the oldest courthouse in Illinois. It features three rooms that contain exhibits of the history of the area and courthouse, French colonial life, the Lewis and Clark Expedition and the role of the post office during that time. Another room is furnished how the courthouse would have looked during the early 1800's. The courthouse may be toured Tuesday through Saturday and is free, but donations are appreciated.