Castillo de San Marcos

E218542

National Monument Spanish colonial fortress historic site masonry fort

Castillo de San Marcos is a 17th-century Spanish stone fortress in St. Augustine, Florida, notable as the oldest masonry fort in the continental United States and a key stronghold in colonial conflicts.

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All labels observed (7)

Label	Occurrences
Castillo de San Marcos canonical	15
Castillo de San Marcos National Monument	12
Castillo de San Marcos coquina fort	1
Castillo de San Marcos garrison	1
Spanish garrison at Castillo de San Marcos	1
Spanish garrison of St. Augustine	1
coquina walls of Castillo de San Marcos	1

How this entity was disambiguated

This entity first appeared as the object of triple T1957353 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Castillo de San Marcos
Context triple: [Siege of St. Augustine (1702), primaryTarget, Castillo de San Marcos]

A. Fort Barrancas
Fort Barrancas is a historic coastal defense fortification located within Naval Air Station Pensacola in Florida, notable for its role in U.S. military history and 19th-century masonry architecture.
B. La Fortaleza
La Fortaleza is the historic governor’s mansion and fortress in Old San Juan, Puerto Rico, recognized as one of the oldest continuously used executive residences in the Americas and a UNESCO World Heritage Site.
C. Castillo del Morro
Castillo del Morro is a historic Spanish fortress guarding the entrance to Havana Bay, renowned for its strategic coastal defenses and iconic lighthouse.
D. Castillo San Felipe del Morro
Castillo San Felipe del Morro is a historic 16th-century Spanish fortress in San Juan, Puerto Rico, renowned for guarding the entrance to San Juan Bay and serving as a key military stronghold in the Caribbean.
E. Fort Moultrie
Fort Moultrie is a historic coastal defense fort on Sullivan’s Island, South Carolina, that played a key role in American military history from the Revolutionary War through World War II.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Castillo de San Marcos
Target entity description: Castillo de San Marcos is a 17th-century Spanish stone fortress in St. Augustine, Florida, notable as the oldest masonry fort in the continental United States and a key stronghold in colonial conflicts.

A. Fort Barrancas
Fort Barrancas is a historic coastal defense fortification located within Naval Air Station Pensacola in Florida, notable for its role in U.S. military history and 19th-century masonry architecture.
B. La Fortaleza
La Fortaleza is the historic governor’s mansion and fortress in Old San Juan, Puerto Rico, recognized as one of the oldest continuously used executive residences in the Americas and a UNESCO World Heritage Site.
C. Castillo del Morro
Castillo del Morro is a historic Spanish fortress guarding the entrance to Havana Bay, renowned for its strategic coastal defenses and iconic lighthouse.
D. Castillo San Felipe del Morro
Castillo San Felipe del Morro is a historic 16th-century Spanish fortress in San Juan, Puerto Rico, renowned for guarding the entrance to San Juan Bay and serving as a key military stronghold in the Caribbean.
E. Fort Moultrie
Fort Moultrie is a historic coastal defense fort on Sullivan’s Island, South Carolina, that played a key role in American military history from the Revolutionary War through World War II.
F. None of above. chosen

Statements (51)

Predicate	Object
instanceOf	National Monument ⓘ Spanish colonial fortress ⓘ historic site ⓘ masonry fort ⓘ
addedToNationalRegisterOfHistoricPlaces	1966 ⓘ
architecturalStyle	bastion fort ⓘ
constructedBy	Spanish Empire ⓘ
constructedFor	defense of St. Augustine ⓘ protection of Spanish Florida ⓘ
country	United States ⓘ linked to: United States of America
designationDate	1924 ⓘ
endDate	1695 ⓘ
formerName	Fort Marion ⓘ
garrisonedBy	British soldiers ⓘ Spanish soldiers ⓘ United States Army ⓘ
hasFeature	bastions ⓘ coquina curtain walls ⓘ moat ⓘ ravelin ⓘ
heritageDesignation	U.S. National Monument ⓘ
locatedIn	Florida ⓘ St. Augustine, Florida ⓘ St. Johns County, Florida NERFINISHED ⓘ United States ⓘ linked to: United States of America historic district of St. Augustine ⓘ
locatedOn	Matanzas Bay ⓘ western shore of Matanzas Bay ⓘ
managedBy	National Park Service ⓘ
materialUsed	coquina stone ⓘ
namedAfter	Saint Mark the Evangelist ⓘ linked to: Mark the Evangelist
notableFor	oldest masonry fort in the continental United States ⓘ oldest stone fortress in the continental United States ⓘ role in colonial conflicts between Spain and Britain ⓘ well-preserved bastion fort design ⓘ
opened	late 17th century ⓘ
openToPublic	yes ⓘ
ownedBy	United States federal government ⓘ linked to: United States government
partOf	Spanish Florida defenses ⓘ linked to: Spanish Florida
renamedAs	Fort Marion ⓘ
renamedFrom	Fort Marion ⓘ
significantEvent	British siege during Queen Anne’s War ⓘ Siege of 1702 ⓘ use during the American Civil War ⓘ use during the American Revolutionary War ⓘ
startDate	1672 ⓘ
touristAttraction	yes ⓘ
usedAs	U.S. Army post ⓘ military fortress ⓘ prison ⓘ prison for Native Americans ⓘ

How these facts were elicited