Louis Obert Mansion

Historical marker location:

2631 S 12th St, Saint Louis, Missouri

( Marker is at the intersection of South 12th Street and McGirk Street, on the right when traveling south on South 12th Street.)

Marker installed: 2019

2631 S 12th St.. Circa 1886

The Missouri State Penitentiary, located in Jefferson City, was once the oldest operating prison west of the Mississippi River. It opened in 1836 and closed in 2004.