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Key West in Monroe County, Florida — The American South (South Atlantic)
 

Big Guns

 
 
Big Guns Marker image. Click for full size.
Photographed by Pete Skillman, November 18, 2023
1. Big Guns Marker
Inscription. Model 1844 8-inch Columbiad
The original guns brought to the Fort in 1856. Two guns were recovered in the early 1980s from the base of the concrete foundation of Battery Osceola.

Model 1858 10-inch Columbiad
Later addition to Fort Taylor. A band around the muzzle helped to reinforce the structural integrity of the piece. These guns were uncovered on the top of the south face.

Model 1861 10-inch Rodman
Rodman cannons were built using a technique called hollow casting. This allowed the gun to be cooled from the inside when cast, increasing the strength and reliability when fired.

Model 1862 300-pdr Parrott Rifle
Parrott guns were rifled, allowing the aerodynamic projectile to spin as it left the gun. This is why these cannons were much more accurate than the smoothbores and could penetrate the walls of Fort Taylor.

Casemates
The guns illustrated below were excavated at Fort Taylor and are on display in the casemates. A combination of granite and slate provide a solid foundation for these gun room floors.

8-inch Columbiad, Smoothbore, 10 pounds powder, 65 pound shot, 2.0 mile range

10-inch Columbiad, Smoothbore, 18 pounds powder, 128 pound shot, 2.7 mile range

10-inch Rodman, Smoothbore, 18 pounds powder, 128 pound shot, 2.7 mile range

Parrott, Rifled, 20 pounds powder, 300 pound shot, 5 mile range

10-inch Rodman on carriage in casemate

Siege Mortar, 21 pounds powder, 46 pound shot, 0.7 mile range

8-inch Siege Mortar
Four of these were used on the top level of the Barrack to protect the Fort from enemy troops trying to move against the fort from the island of Key West.
 
Erected by Florida State Parks
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Topics. This historical marker is listed in these topic lists: Forts and CastlesWar, US Civil.
 
Location. 24° 32.891′ N, 81° 48.619′ W. Marker is in Key West, Florida, in Monroe County. It can be reached from the intersection of Angela Street and Quay Road. Touch for map. Marker is in this post office area: Key West FL 33040, United States of America. Touch for directions.

Regionally, this marker is on the Florida Keys. It is also in the American South and on the Gulf Coast. Globally, it is in the North Atlantic Region, North America, a Gulf of Mexico state, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once New Spain, the territory of the Mississippian Culture, one of the Confederate States of America, and the Antebellum South.

Other nearby markers. At least 8 other markers are within walking distance of this marker: The Sherlock Holmes of Fort Zachary Taylor (a few steps from this marker); Harbor View (within shouting distance of this marker); Life in the Barrack (within shouting distance of this marker); Battery Adair (within shouting distance of this marker); Sally Port (within shouting distance of this marker); Battery Osceola (within shouting distance of this marker); Hidden Treasure (about 300 feet away, measured in a direct line); Fort Taylor (about 300 feet away). Touch for a list and map of all markers in Key West.
 
Also see . . .
1. Fort Zachary Taylor Historic State Park. Florida State Parks (Submitted on January 30, 2024.) 

2. Fort Zachary Taylor Historic State Park. Wikipedia (Submitted on January 30, 2024.) 
 
Big Guns Marker image. Click for full size.
Photographed by James Hulse, January 13, 2026
2. Big Guns Marker
The view of the marker with the guns in the brick enclosure.
8-inch Columbiad at Fort Zachary Taylor image. Click for full size.
Photographed by Pete Skillman, November 18, 2023
3. 8-inch Columbiad at Fort Zachary Taylor
10-inch Columbiad at Fort Zachary Taylor image. Click for full size.
Photographed by Pete Skillman, November 18, 2023
4. 10-inch Columbiad at Fort Zachary Taylor
10-inch Rodman at Fort Zachary Taylor image. Click for full size.
Photographed by Pete Skillman, November 18, 2023
5. 10-inch Rodman at Fort Zachary Taylor
300-pdr Parrott at Fort Zachary Taylor image. Click for full size.
Photographed by Pete Skillman, November 18, 2023
6. 300-pdr Parrott at Fort Zachary Taylor
 
 
Credits. This page was last revised on January 13, 2026. It was originally submitted on January 30, 2024, by Pete Skillman of Townsend, Delaware. This page has been viewed 272 times since then and 43 times this year. Photos:   1. submitted on January 30, 2024, by Pete Skillman of Townsend, Delaware.   2. submitted on January 13, 2026, by James Hulse of Medina, Texas.   3, 4, 5, 6. submitted on January 30, 2024, by Pete Skillman of Townsend, Delaware. • Bernard Fisher was the editor who published this page.
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Jun. 22, 2026