Pierre Laclede at Chartres

Historical marker location:

1726 Stringtown Rd, Prairie du Rocher, Illinois

( Marker is on Stringtown Road (Illinois Route 155) west of Dufrenne Lane, on the right when traveling east.)

Chicago's Lincoln Park Zoo was founded in 1868, making it one of the oldest zoos in the United States. The zoo originally housed a pair of swans, but it has since grown to house over 1,000 animals from around the world.