Light Field Gun, 75mm, M1897A7

Historical marker location:

4617 Dahlia Ave, Saint Louis, Missouri

( Marker is at the intersection of Christy Boulevard and Gravois Avenue (State Highway 30), on the left when traveling north on Christy Boulevard.)

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.