The "Old Marion County Jail" built in 1858 in Palmyra, Missouri, was used as a Federal prison during the Civil War. It is included on the National Register of Historic Places. Restoration is ongoing by The Heritage Seekers, a local not-for-profit, the members of which are all volunteers.
Tours for individuals and groups can be arranged along with information about "The Palmyra Massacre" an infamous event in which 10 prisoners who had refused to sign the Oath of Allegiance to the Union were shot because a Union "Snitch" had been kidnapped. The original cell block where these men were held before their execution is a part of the tour of the "Old Jail" located at the corner of Lafayette and Dickerson in Palmyra.
Also located in the two-story brick jailers home is a Genealogy Resource Center where visitors can locate information about ancestors in North East Missouri. The Center is staffed from 10 a.m. until 2 p.m. on Wednesdays and by appointment.