30 St Mary Axe
E89996
commercial building
energy-efficient building
high-rise building
landmark
office building
skyscraper
30 St Mary Axe is a distinctive, energy-efficient commercial skyscraper in the City of London, popularly known as “The Gherkin” for its unique curved, tapering shape.
All labels observed (4)
| Label | Occurrences |
|---|---|
| 30 St Mary Axe canonical | 11 |
| The Gherkin | 4 |
| St Mary Axe | 1 |
| Swiss Re Headquarters (The Gherkin) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T761941 — 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: 30 St Mary Axe Context triple: [Norman Foster, notableWork, 30 St Mary Axe]
-
A.
The Shard
The Shard is a landmark glass skyscraper in London known for its sharp, shard-like design and status as one of the tallest buildings in the United Kingdom.
-
B.
Skylon Tower
Skylon Tower is an observation tower in Niagara Falls, Ontario, known for its panoramic views of the falls and its revolving dining room.
-
C.
Canary Wharf
Canary Wharf is a major business and financial district in East London known for its cluster of modern skyscrapers and corporate headquarters.
-
D.
Barbican
The Barbican is Plymouth’s historic harbourside district, known for its cobbled streets, preserved Elizabethan architecture, and vibrant waterfront pubs and galleries.
-
E.
Barbican
The Barbican in Kraków is a well-preserved medieval fortified outpost and gateway that once formed part of the city’s defensive walls.
- 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: 30 St Mary Axe Target entity description: 30 St Mary Axe is a distinctive, energy-efficient commercial skyscraper in the City of London, popularly known as “The Gherkin” for its unique curved, tapering shape.
-
A.
The Shard
The Shard is a landmark glass skyscraper in London known for its sharp, shard-like design and status as one of the tallest buildings in the United Kingdom.
-
B.
Skylon Tower
Skylon Tower is an observation tower in Niagara Falls, Ontario, known for its panoramic views of the falls and its revolving dining room.
-
C.
Canary Wharf
Canary Wharf is a major business and financial district in East London known for its cluster of modern skyscrapers and corporate headquarters.
-
D.
Barbican
The Barbican is Plymouth’s historic harbourside district, known for its cobbled streets, preserved Elizabethan architecture, and vibrant waterfront pubs and galleries.
-
E.
Barbican
The Barbican in Kraków is a well-preserved medieval fortified outpost and gateway that once formed part of the city’s defensive walls.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
commercial building
ⓘ
energy-efficient building ⓘ high-rise building ⓘ landmark ⓘ office building ⓘ skyscraper ⓘ |
| alsoKnownAs |
Swiss Re Headquarters
ⓘ
surface form:
Swiss Re Building
30 St Mary Axe ⓘ
surface form:
The Gherkin
|
| architect |
Ken Shuttleworth
ⓘ
Norman Foster ⓘ |
| architecturalStyle | high-tech architecture ⓘ |
| architectureFirm |
Foster + Partners
ⓘ
surface form:
Foster and Partners
|
| buildingType | commercial offices ⓘ |
| citySkylineRole | iconic landmark of London skyline ⓘ |
| completionDate | 2003 ⓘ |
| constructionStartDate | 2001 ⓘ |
| country | United Kingdom ⓘ |
| developer | Swiss Re ⓘ |
| elevatorCount | 18 ⓘ |
| fireIncident | site formerly occupied by Baltic Exchange damaged by 1992 bombing ⓘ |
| floorArea |
about 47,950 square metres
ⓘ
about 516,000 square feet ⓘ |
| floorCount | 41 ⓘ |
| hasFeature |
diagrid structure
ⓘ
double glazing ⓘ energy-efficient design ⓘ natural ventilation system ⓘ panoramic top-floor lounge ⓘ spiral light wells ⓘ |
| hasNickNameOrigin | named The Gherkin for its curved, tapering shape ⓘ |
| hasObservationFacility | top-floor viewing and dining area ⓘ |
| height |
180 metres
ⓘ
591 feet ⓘ |
| locatedIn |
City of London
ⓘ
England ⓘ London, England ⓘ
surface form:
London
United Kingdom ⓘ |
| materialUsed |
glass
ⓘ
steel ⓘ |
| namedAfter | St Mary Axe street ⓘ |
| openingDate | 2004 ⓘ |
| owner | Safra Group ⓘ |
| replaced | Baltic Exchange building ⓘ |
| roofShape | tapering dome ⓘ |
| status | completed ⓘ |
| streetAddress | 30 St Mary Axe self-link ⓘ |
| structuralEngineer |
Ove Arup & Partners
ⓘ
surface form:
Arup
|
| uses |
hospitality space
ⓘ
office space ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: 30 St Mary Axe Description of subject: 30 St Mary Axe is a distinctive, energy-efficient commercial skyscraper in the City of London, popularly known as “The Gherkin” for its unique curved, tapering shape.
Referenced by (17)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Swiss Re Headquarters (The Gherkin)
this entity surface form:
The Gherkin
this entity surface form:
The Gherkin
this entity surface form:
The Gherkin
this entity surface form:
The Gherkin
this entity surface form:
St Mary Axe
subject surface form:
St Mary Axe
subject surface form:
St Mary Axe
subject surface form:
St Mary Axe