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Cahokia Courthouse: Stepping Back into Illinois's Territorial Past

Explore Illinois's oldest courthouse, a French Colonial gem where Lewis and Clark planned their epic expedition. A journey into the state's territorial past.

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The Cahokia Courthouse, dating back to the 1740s, stands as Illinois's oldest courthouse and a unique example of French Colonial architecture. It served as a vital center for political and legal activities in the Northwest Territory and even functioned as Lewis and Clark's headquarters from 1803 to 1804 as they prepared for their expedition.

A brief summary to Cahokia Courthouse

Local tips

  • Check the operating hours before visiting, as the courthouse is typically open Thursday through Saturday.
  • Take a guided tour to learn more about the courthouse's history and significance.
  • Explore the exhibits to discover the types of cases that were heard in the courthouse in the early 1800s.
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Getting There

  • Public Transport

    The Cahokia Courthouse is accessible via public transportation. From various points in Cahokia Heights, you can take the MetroBus to the stop at Illinois Route 3 @ 4th Street. From there, it is a short walk to the courthouse. A single MetroBus ride costs $1.

  • Walking

    If you are already in the Cahokia Heights area, walking to the Cahokia Courthouse is a viable option. The courthouse is located at 107 Elm Street, and is easily accessible from nearby landmarks. Be mindful of pedestrian walkways and street signs.

  • Driving

    If driving, you can reach the Cahokia Courthouse via Illinois Route 3. The courthouse has an asphalt parking lot with designated accessible parking spaces. Parking is free.

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Discover more about Cahokia Courthouse

The Cahokia Courthouse offers a captivating glimpse into Illinois's territorial infancy. Originally built around 1740 as a French dwelling, the structure was converted into a courthouse in 1793, becoming the oldest courthouse in Illinois. Its French Colonial vertical log construction, known as poteaux-sur-solle, showcases the region's early architectural influences. For two decades, the courthouse served as a center of political and legal activity in the United States Northwest Territory. Notably, from the winter of 1803 to the spring of 1804, Meriwether Lewis and William Clark used the courthouse as their headquarters as they prepared for their famous expedition. They gathered supplies, met with territorial leaders, collected information, and corresponded with President Jefferson, all within the walls of this historic building. The courthouse has a rich and storied past, including being dismantled and moved to St. Louis for the 1904 World's Fair and later to Chicago's Jackson Park in 1906. In 1939, it was reconstructed on its original site in Cahokia, where it stands today. Today, the Cahokia Courthouse functions as a museum and historic site. Visitors can explore exhibits depicting cases handled around 1800 and learn about the building's French roots. A fourth room is furnished to represent the courtroom of 1790, complete with limestone fireplaces and French-style doors. Guided tours are available, and the site also hosts special events throughout the year, including a colonial Mardi Gras celebration and an old-time music festival.

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