Ohio
1,610 markers across 88 counties
View on mapNotable Markers
First UPC Barcode Retail Scan
Troy, Miami
On June 26, 1974, the first retail scan of a product marked with a Universal Product Code (UPC or barcode) was made i...
Camp Circleville-90th Ohio Volunteer Infantry / Camp Circleville-114th Ohio Volunteer Infantry
Across the road was the site of Camp Circleville, where members of the 90th and 114th Ohio Volunteer Infantry (O.V.I....
Anti-Slavery Tensions in Muskingum County
Zanesville, Muskingum
In the early 1800s, opposing attitudes existed in the separate communities of Putnam and Zanesville.
Gallipolis
Gallipolis, Gallia
Its location and the tides of war established Gallipolis, then a town of some 3,000, as a point of strategic military...
Muskingum River Underground Railroad / Marietta Leaders of the Underground Railroad
Marietta, Washington
People living in Marietta and along the Muskingum River shared a history of slavery opposition.
Old Wilberforce University Campus at Tawana Springs
Wilberforce, Greene
In the early 1800s, William and Eleanor Kendall owned this land, known for its natural springs, beauty, and farmland.