Ft McHenry's place in history is with the War of 1812 and the Francis Scott Key's poem Star Spangled Banner. During the Civil War Ft. McHenry was a Civil war fort. The fort has a a battery of Rodman guns on display. There are 8 inch and 15 smoothbores and 8 inch rifled guns.
8 inch rifled Rodman's

Rodman Battery

8 inch Rodman

15 inch Rodman

15 inch Rodman muzzle. Sorry Blaster, no powder can, will a wife do?

15 inch Rodman Muzzle detail

8 inch Rodman Muzzle detail

15 inch Rodman trunnion

8 inch Rodman trunnion.