The Great Floyd Gun, cast at the Fort Pitt Foundry, Pittsburgh, Frank Leslie, 25 February 1860

The great floyd gun, cast at the fort pitt foundry, pittsburg, pa. , on the 18th of january, 1860—the largest piece of ordnance in the world. The rodman gun (better known as the floyd gun), was 15 inches in the base, and the union gun only 12 inches. Reference new york times article - the great floyd gun rodman type: m. 1861 15-inch eplanation on why the name of the gun was changed from floyd to lincoln]. Date: 25 February 1860.