Jefferson National Expansion Memorial

E184010

historic district national memorial protected area

Jefferson National Expansion Memorial was the former name of the St. Louis riverfront park that includes the Gateway Arch and commemorates the westward expansion of the United States.

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All labels observed (4)

Label	Occurrences
Gateway Arch National Park	7
Jefferson National Expansion Memorial canonical	2
Gateway Arch National Park (commemorative)	1
Jefferson National Expansion Memorial landscape	1

How this entity was disambiguated

This entity first appeared as the object of triple T1596355 — 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: Jefferson National Expansion Memorial
Context triple: [Gateway Arch, previousNameOfPark, Jefferson National Expansion Memorial]

A. MacArthur Memorial
The MacArthur Memorial is a museum and final resting place in Norfolk, Virginia, dedicated to the life, military career, and legacy of U.S. General Douglas MacArthur.
B. Jefferson Barracks, Missouri
Jefferson Barracks, Missouri is a historic U.S. Army post near St. Louis that served as a key military installation and training center throughout the 19th and 20th centuries.
C. Statue of Liberty National Monument
The Statue of Liberty National Monument is a U.S. national monument encompassing the iconic Statue of Liberty and surrounding areas in New York Harbor, symbolizing freedom and democracy.
D. Centre des monuments nationaux
The Centre des monuments nationaux is a French public institution responsible for managing, preserving, and opening to the public many of France’s most important historic monuments and sites.
E. Lewis and Clark National Historical Park
Lewis and Clark National Historical Park is a U.S. National Park that preserves sites along the Pacific Coast associated with the 1804–1806 Lewis and Clark Expedition, including Fort Clatsop near the mouth of the Columbia River.
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: Jefferson National Expansion Memorial
Target entity description: Jefferson National Expansion Memorial was the former name of the St. Louis riverfront park that includes the Gateway Arch and commemorates the westward expansion of the United States.

A. MacArthur Memorial
The MacArthur Memorial is a museum and final resting place in Norfolk, Virginia, dedicated to the life, military career, and legacy of U.S. General Douglas MacArthur.
B. Jefferson Barracks, Missouri
Jefferson Barracks, Missouri is a historic U.S. Army post near St. Louis that served as a key military installation and training center throughout the 19th and 20th centuries.
C. Statue of Liberty National Monument
The Statue of Liberty National Monument is a U.S. national monument encompassing the iconic Statue of Liberty and surrounding areas in New York Harbor, symbolizing freedom and democracy.
D. Centre des monuments nationaux
The Centre des monuments nationaux is a French public institution responsible for managing, preserving, and opening to the public many of France’s most important historic monuments and sites.
E. Lewis and Clark National Historical Park
Lewis and Clark National Historical Park is a U.S. National Park that preserves sites along the Pacific Coast associated with the 1804–1806 Lewis and Clark Expedition, including Fort Clatsop near the mouth of the Columbia River.
F. None of above. chosen

Statements (42)

Predicate	Object
instanceOf	historic district ⓘ national memorial ⓘ protected area ⓘ
administeredBy	National Park Service ⓘ
architecturalStyleOfMainStructure	modernist ⓘ
associatedWithPresident	Thomas Jefferson ⓘ
authorizedBy	United States Congress ⓘ
category	Monuments and memorials in Missouri ⓘ Parks in St. Louis, Missouri ⓘ Protected areas on the Mississippi River ⓘ United States national memorials ⓘ
city	St. Louis, Missouri, United States ⓘ surface form: St. Louis
commemorates	Louisiana Purchase ⓘ westward expansion of the United States ⓘ
containsStructureDesignedBy	Eero Saarinen ⓘ
containsStructureEngineeredBy	Hannskarl Bandel NERFINISHED ⓘ
country	United States of America ⓘ surface form: United States
currentName	Gateway Arch ⓘ surface form: Gateway Arch National Park
designationChangedTo	Gateway Arch ⓘ surface form: Gateway Arch National Park
designationChangeYear	2018 ⓘ
established	1935 ⓘ
formerDesignation	national memorial ⓘ
formerNameOf	Gateway Arch ⓘ surface form: Gateway Arch National Park
governingBody	National Park Service ⓘ
hasMuseum	Museum of Westward Expansion ⓘ
hasPart	Gateway Arch ⓘ Museum of Westward Expansion ⓘ Old Courthouse ⓘ
hasVisitorCenter	Gateway Arch ⓘ surface form: Gateway Arch Visitor Center
locatedIn	Missouri ⓘ St. Louis, Missouri, United States ⓘ surface form: St. Louis United States of America ⓘ surface form: United States
locatedOn	Mississippi riverfront ⓘ surface form: Mississippi River waterfront
namedAfter	Thomas Jefferson ⓘ
NRHPType	National Historic Landmark District ⓘ
partOf	United States National Park System ⓘ surface form: National Park System
primaryAttraction	Gateway Arch ⓘ
purpose	to commemorate the role of St. Louis in the westward expansion of the United States ⓘ
region	Midwestern United States ⓘ
state	Missouri ⓘ
theme	American frontier history ⓘ exploration and settlement of the American West ⓘ

How these facts were elicited

Referenced by (11)

Full triples — surface form annotated when it differs from this entity's canonical label.

Gateway Arch → previousNameOfPark → Jefferson National Expansion Memorial ⓘ

Old Courthouse → formerlyPartOf → Jefferson National Expansion Memorial ⓘ

subject surface form: Old Courthouse (St. Louis)

Gateway City → hasNotableSymbol → Jefferson National Expansion Memorial ⓘ