Kansas officials disclosed the contents of a time capsule unearthed during the recent demolition of the historic Johnson County Courthouse building in Olathe, just outside of Kansas City, this week.

According to Fox4KC, the copper box, which was X-rayed at a local art museum before being opened with a crowbar, was discovered inside a wall at the former courtroom on May 7, 1951.

“There were clues in newspaper pieces published at the time that they had placed a time capsule in, but I don’t believe they realized that, ‘Oh yeah, there was a time capsule here,’ until they started tearing the building apart,” said Anne Jones, curator of collections at the Johnson County Museum.

Museum employees discovered a program from the Olathe rodeo, a 1950 local phone directory book, images of the original courthouse’s construction, and 36 sealed envelopes from various cities, people, and the court within the box, according to Fox4KC.

A program from a model airplane meeting held at the old Naval Air Station in Olathe, as well as a trial docket dated May 5, 1951, were also discovered, according to the station.

“There’s a formal correspondence from John Anderson Jr., who was the county attorney at the time and later became Kansas’ 36th governor,” Johnson County Board of County Commissioners Chairman Ed Eilert told Fox4KC.

County employees are allegedly attempting to preserve the records before displaying them to the public.