Near Charleston in Charleston County, South Carolina — The American South (South Atlantic)

15-Inch Rodman

Photographed by Craig Swain, May 3, 2010

1. 15-Inch Rodman Marker

Inscription.
Designed by Thomas J. Rodman, U.S. Army Ordnance Officer, this type of cannon was the largest gun used in combat during the Civil War. These two Rodmans were brought to Fort Sumter as part of the 1870's modernization program.

Tube Weight: 50,000 pounds (22680 Kg)
Maximum Range: 5579 yards (5101 M)

Topics. This historical marker is listed in this topic list: War, US Civil. A significant historical month for this entry is April 1861.

Location. 32° 45.162′ N, 79° 52.493′ W. Marker is near Charleston, South Carolina, in Charleston County. It can be reached from Fort Sumter Ferry Terminal. Marker is located at Fort Sumter National Monument and only reached by boat. Touch for map. Marker is in this post office area: Charleston SC 29412, United States of America. Touch for directions.

Regionally, this marker is in Historic Charleston

and in the Lowcountry.

It is also in the American South,

specifically in the Deep South,

and on the Eastern Seaboard. Globally, it is in the North Atlantic Region,

North America,

the Western Hemisphere,

the Western World,

and the Anglosphere.

Historically, it finds itself in what was once the territory

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of the Mississippian Culture,

one of the original Thirteen Colonies,

one of the Confederate States of America,

and the Antebellum South.

Other nearby markers. At least 10 other markers are within walking distance of this marker: Arming the Fort (here, next to this marker); 8-Inch Columbiad (here, next to this marker); Holding the Fort (a few steps from this marker); Mining Casemate (a few steps from this marker); 10-Inch Mortar, Model 1819 (a few steps from this marker); 42-Pounder, Banded and Rifled (within shouting distance of this marker); Siege of Fort Sumter (within shouting distance of this marker); Fort Sumter Today (within shouting distance of this marker); Fort Sumter 1861-65 (within shouting distance of this marker); Casemates and Cannon (within shouting distance of this marker). Touch for a list and map of all markers in Charleston.

Also see . . . Thomas Jackson Rodman. Thomas Jackson Rodman (July 31, 1816 – June 7, 1871) was an American artillerist, inventor, ordnance specialist, and career United States Army officer. (Submitted on June 19, 2012, by Brian Scott of Anderson, South Carolina.)

Markers and Cannons in Front of the Right Flank Casemates image. Click for full size.

Photographed by Craig Swain

2. Markers and Cannons in Front of the Right Flank Casemates

15-Inch Rodman image. Click for full size.

Photographed by Craig Swain, May 3, 2010

3. 15-Inch Rodman

This Rodman gun was among a batch produced in 1867 by the Scott Foundry of Seyfert, McManus & Company of Reading, Pennsylvania. Among the Rodman's design features are the "mushroom" knob and the sockets where the elevating mechanism engaged the gun.

Thomas Jackson Rodman<br>July 31, 1816 – June 7, 1871 image. Click for full size.

Photographed by Wikipedia, 1865

4. Thomas Jackson Rodman
July 31, 1816 – June 7, 1871

Credits. This page was last revised on January 4, 2026. It was originally submitted on May 12, 2010, by Craig Swain of Leesburg, Virginia. This page has been viewed 1,755 times since then and 77 times this year. Photos: 1. submitted on May 12, 2010, by Craig Swain of Leesburg, Virginia. 2. submitted on May 11, 2010, by Craig Swain of Leesburg, Virginia. 3. submitted on May 12, 2010, by Craig Swain of Leesburg, Virginia. 4. submitted on June 19, 2012, by Brian Scott of Anderson, South Carolina.