Cahokia Court House
Originally constructed as a dwelling, the Cahokia Courthouse served as the center of political activity in the Old Northwest Territory. The courthouse also served as a U.S. territorial courthouse and the county seat for several years. Additional information about the courthouse can be found on the History page.
Holy Family Log Church
The Holy Family Log Church was established in 1699 by Catholic missionaries from the seminary of Quebec. The church was dedicated in 1799 as a church of the Diocese of Baltimore, which comprised all territory within the original limits of the U.S. The Holy Family Log Church is the oldest church west of the Allegheny Mountains.
Jarrot Mansion
The Jarrot Mansion was completed in the year 1810 for Nicholas Jarrot, a native Frenchman who achieved prosperity through trade, land, and law in frontier Cahokia. The Jarrot Mansion is the oldest brick home in the state of Illinois.
