From the record
“The Knox County Courthouse, located on the public square of Knoxville near its associated hall of records, is the former county courthouse of Knox County, Illinois. The courthouse was built in 1840 to replace the county's first courthouse; built in 1831 shortly after the county's organization, it had been outgrown by the end of the decade.”
Wikipedia article Knox County Courthouse (Knoxville, Illinois), CC BY-SA 4.0.
One of 7 National Register listings published here for Knox County · listed in 1992 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article




