Leaning Tower of Pisa
E663526
The Leaning Tower of Pisa is a famous freestanding bell tower in Pisa, Italy, renowned worldwide for its unintended tilt and status as an iconic symbol of Italian architecture and history.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Leaning Tower of Pisa canonical | 26 |
| Leaning Tower | 1 |
| The Leaning Tower | 1 |
| Torre pendente di Pisa | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7433407 — 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: Leaning Tower of Pisa Context triple: [Leaning Tower of Niles, inspiredBy, Leaning Tower of Pisa]
-
A.
Torre del Mangia
Torre del Mangia is a historic 14th-century brick bell tower dominating Siena’s Piazza del Campo and serving as one of the city’s most iconic symbols.
-
B.
Cathedral museum of Pisa
The Cathedral Museum of Pisa is a museum in the Piazza dei Miracoli that preserves and displays artworks, sculptures, and liturgical objects from the Pisa Cathedral and its monumental complex.
-
C.
Torre Guinigi
Torre Guinigi is a medieval brick tower in Lucca, Italy, famous for the oak trees growing on its rooftop garden and its panoramic views over the city.
-
D.
Pisa Baptistery
The Pisa Baptistery is a large Romanesque-Gothic circular baptistery in Pisa, Italy, renowned for its striking architecture, remarkable acoustics, and position alongside the Leaning Tower and cathedral in the Piazza dei Miracoli.
-
E.
Pisa Cathedral complex
The Pisa Cathedral complex is a renowned medieval ensemble in Pisa, Italy, famous for its monumental cathedral, baptistery, and the Leaning Tower, exemplifying the height of Romanesque art and architecture.
- 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: Leaning Tower of Pisa Target entity description: The Leaning Tower of Pisa is a famous freestanding bell tower in Pisa, Italy, renowned worldwide for its unintended tilt and status as an iconic symbol of Italian architecture and history.
-
A.
Torre del Mangia
Torre del Mangia is a historic 14th-century brick bell tower dominating Siena’s Piazza del Campo and serving as one of the city’s most iconic symbols.
-
B.
Cathedral museum of Pisa
The Cathedral Museum of Pisa is a museum in the Piazza dei Miracoli that preserves and displays artworks, sculptures, and liturgical objects from the Pisa Cathedral and its monumental complex.
-
C.
Torre Guinigi
Torre Guinigi is a medieval brick tower in Lucca, Italy, famous for the oak trees growing on its rooftop garden and its panoramic views over the city.
-
D.
Pisa Baptistery
The Pisa Baptistery is a large Romanesque-Gothic circular baptistery in Pisa, Italy, renowned for its striking architecture, remarkable acoustics, and position alongside the Leaning Tower and cathedral in the Piazza dei Miracoli.
-
E.
Pisa Cathedral complex
The Pisa Cathedral complex is a renowned medieval ensemble in Pisa, Italy, famous for its monumental cathedral, baptistery, and the Leaning Tower, exemplifying the height of Romanesque art and architecture.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
World Heritage Site component
ⓘ
bell tower ⓘ freestanding bell tower ⓘ |
| architect |
Bonanno Pisano
ⓘ
Gherardo di Gherardo ⓘ |
| architecturalStyle | Romanesque architecture ⓘ |
| causeOfTilt |
inadequate foundation
ⓘ
unstable subsoil ⓘ |
| closedForStabilization | 1990 ⓘ |
| constructionEndDate | 1372 ⓘ |
| constructionPeriod |
12th century
ⓘ
13th century ⓘ 14th century ⓘ |
| constructionStartDate | 1173 ⓘ |
| coordinateLocation | 43.7230° N, 10.3966° E ⓘ |
| country | Italy ⓘ |
| dedicatedTo | Assumption of Mary ⓘ |
| floorCount | 8 levels including belfry ⓘ |
| function | bell tower of Pisa Cathedral ⓘ |
| hasPart |
7 bells
ⓘ
arcaded loggias ⓘ belfry ⓘ spiral staircase ⓘ |
| hasStairCount | 294 steps ⓘ |
| height |
about 183 feet
ⓘ
about 56 metres ⓘ |
| heritageCriteria | UNESCO criteria (i)(ii)(iv) ⓘ |
| heritageDesignation | UNESCO World Heritage Site ⓘ |
| knownFor |
iconic Italian landmark
ⓘ
unintended tilt ⓘ |
| languageOfNativeName | Italian ⓘ |
| locatedIn |
Italy
ⓘ
Pisa ⓘ Tuscany ⓘ |
| materialUsed | white marble ⓘ |
| mediaFranchise | frequently depicted in popular culture ⓘ |
| nativeName |
Torre pendente di Pisa
ⓘ
linked to:
Leaning Tower of Pisa
|
| numberOfFloors | 8 ⓘ |
| numberOfStoreys | 8 ⓘ |
| openedToPublic | 14th century ⓘ |
| partOf |
Cathedral Square of Pisa
ⓘ
linked to:
Piazza del Duomo, Pisa
Piazza del Duomo ⓘ |
| reopenedAfterStabilization | 2001 ⓘ |
| serves |
Pisa Cathedral
ⓘ
linked to:
Pisa Cathedral complex
|
| stabilizationWork | late 20th century ⓘ |
| symbolOf |
Italy
ⓘ
Pisa ⓘ |
| tilt | about 4 degrees ⓘ |
| UNESCOWorldHeritageSite | Piazza del Duomo, Pisa ⓘ |
| visitorAttraction | millions of visitors per year ⓘ |
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: Leaning Tower of Pisa Description of subject: The Leaning Tower of Pisa is a famous freestanding bell tower in Pisa, Italy, renowned worldwide for its unintended tilt and status as an iconic symbol of Italian architecture and history.
Referenced by (29)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Piazza del Duomo
subject linked to:
Piazza del Duomo
subject linked to:
Cathedral museum of Pisa
subject linked to:
Cathedral museum of Pisa
linked to: Leaning Tower of Pisa
linked to: Leaning Tower of Pisa
subject linked to:
Opera del Duomo Museum
subject linked to:
Opera del Duomo Museum
linked to: Leaning Tower of Pisa