Old Colombo Lighthouse (Clock Tower)
E553907
The Old Colombo Lighthouse (Clock Tower) is a historic 19th-century clock tower in Colombo, Sri Lanka, that once served as both a timekeeping landmark and a lighthouse guiding ships into the harbor.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Colombo Fort Clock Tower | 1 |
| Colombo Old Town Hall | 1 |
| Old Colombo Lighthouse | 1 |
| Old Colombo Lighthouse (Clock Tower) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5874400 — 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: Old Colombo Lighthouse (Clock Tower) Context triple: [Colombo Fort, contains, Old Colombo Lighthouse (Clock Tower)]
-
A.
Galle Clock Tower
The Galle Clock Tower is a prominent 19th-century clock tower and landmark situated within the historic Galle Fort in Sri Lanka.
-
B.
Galle Lighthouse
Galle Lighthouse is a historic coastal beacon and popular tourist landmark situated within the Galle Fort area of Galle, Sri Lanka.
-
C.
Colombo Fort
Colombo Fort is the historic commercial and administrative district of Colombo, Sri Lanka, known for its colonial-era architecture and role as the city’s financial hub.
-
D.
Parliament Building, Colombo
Parliament Building, Colombo is a historic colonial-era legislative complex in Sri Lanka that long served as the seat of the country’s national parliament.
-
E.
Queen's House, Colombo
Queen's House, Colombo is a historic colonial-era mansion in Sri Lanka that served as the official residence of the British Governor of Ceylon and later the country's heads of state.
- 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: Old Colombo Lighthouse (Clock Tower) Target entity description: The Old Colombo Lighthouse (Clock Tower) is a historic 19th-century clock tower in Colombo, Sri Lanka, that once served as both a timekeeping landmark and a lighthouse guiding ships into the harbor.
-
A.
Galle Clock Tower
The Galle Clock Tower is a prominent 19th-century clock tower and landmark situated within the historic Galle Fort in Sri Lanka.
-
B.
Galle Lighthouse
Galle Lighthouse is a historic coastal beacon and popular tourist landmark situated within the Galle Fort area of Galle, Sri Lanka.
-
C.
Colombo Fort
Colombo Fort is the historic commercial and administrative district of Colombo, Sri Lanka, known for its colonial-era architecture and role as the city’s financial hub.
-
D.
Parliament Building, Colombo
Parliament Building, Colombo is a historic colonial-era legislative complex in Sri Lanka that long served as the seat of the country’s national parliament.
-
E.
Queen's House, Colombo
Queen's House, Colombo is a historic colonial-era mansion in Sri Lanka that served as the official residence of the British Governor of Ceylon and later the country's heads of state.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
clock tower
ⓘ
former lighthouse ⓘ historic building ⓘ |
| alsoKnownAs |
Colombo Fort Clock Tower
ⓘ
linked to:
Old Colombo Lighthouse (Clock Tower)
Old Colombo Lighthouse ⓘ
linked to:
Old Colombo Lighthouse (Clock Tower)
|
| architecturalStyle | Victorian ⓘ |
| category |
Buildings and structures in Colombo
ⓘ
Clock towers in Sri Lanka ⓘ Lighthouses in Sri Lanka ⓘ |
| constructionEnd | 1857 ⓘ |
| constructionStart | 1856 ⓘ |
| country | Sri Lanka ⓘ |
| era | 19th century ⓘ |
| function |
lighthouse
ⓘ
timekeeping ⓘ |
| hasCoordinate | approximately 6.933°N 79.842°E ⓘ |
| hasPart |
clock
ⓘ
lantern (former) ⓘ |
| height | approximately 29 m ⓘ |
| heritageDesignation | Archaeological Protected Monument of Sri Lanka ⓘ |
| heritageStatus | protected monument ⓘ |
| inception | 1857 ⓘ |
| lightDeactivated | early 20th century ⓘ |
| locatedIn |
Colombo
ⓘ
Colombo Fort ⓘ Western Province, Sri Lanka ⓘ |
| locatedNear |
Colombo Harbour
ⓘ
Lloyd’s Building, Colombo ⓘ President’s House, Colombo ⓘ
linked to:
Queen's House, Colombo
|
| locatedOn | Chatham Street ⓘ |
| materialUsed |
brick
ⓘ
stone ⓘ |
| notableFor | dual role as clock tower and lighthouse ⓘ |
| operator |
Sri Lanka Ports Authority (historical)
ⓘ
linked to:
Sri Lanka Ports Authority
|
| ownedBy | Government of Sri Lanka ⓘ |
| region | South Asia ⓘ |
| replacedBy | Colombo Lighthouse (Galle Buck Lighthouse) ⓘ |
| significance |
one of the oldest clock towers in Sri Lanka
ⓘ
served as main lighthouse for Colombo Harbour in the 19th century ⓘ |
| status |
active clock tower
ⓘ
inactive lighthouse ⓘ |
| touristAttraction | yes ⓘ |
| usedFor |
guiding ships into Colombo Harbour
ⓘ
public timekeeping for Colombo ⓘ |
| visibleFrom | Colombo Harbour ⓘ |
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: Old Colombo Lighthouse (Clock Tower) Description of subject: The Old Colombo Lighthouse (Clock Tower) is a historic 19th-century clock tower in Colombo, Sri Lanka, that once served as both a timekeeping landmark and a lighthouse guiding ships into the harbor.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Old Colombo Lighthouse (Clock Tower)
linked to: Old Colombo Lighthouse (Clock Tower)
linked to: Old Colombo Lighthouse (Clock Tower)