Cahokia Courthouse, Prairie State Travel Guide

The Cahokia Courthouse, located in Cahokia Heights, Illinois, offers a unique glimpse into the state's formative years. Constructed around 1740 as a French residence, the building exemplifies the poteaux-sur-solle (post-on-sill) construction technique brought by settlers from Normandy. In 1793, it was transformed into a courthouse, becoming a center for political and legal activities in the United States Northwest Territory.The courthouse holds historical significance as the oldest in Illinois and the only one remaining from its territorial period (1787-1818). From December 1803 to spring 1804, it served as a headquarters for Lewis and Clark as they gathered supplies and information for their expedition. The building was dismantled in 1901 and showcased at the 1904 World's Fair in St. Louis and the 1906 Chicago's Jackson Park before being returned to Cahokia and reconstructed on its original site in 1939.Today, the Cahokia Courthouse functions as a museum and historic site. Visitors can explore exhibits depicting court cases from the 1800s and the building's French roots. One room is furnished to recreate the courtroom of 1790, complete with limestone fireplaces and shuttered windows. The visitor center also features exhibits on the nearby Jarrot Mansion and the French occupation of the area. The site hosts special events, including the Fete du Bon Vieux Temps and the Old Time Music Fete.