Iron Pillar of Delhi
E303214
The Iron Pillar of Delhi is an ancient, corrosion-resistant wrought iron column from the Gupta period, renowned for its metallurgical sophistication and historical inscriptions.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Iron Pillar of Delhi canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T2846658 — 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: Iron Pillar of Delhi Context triple: [Qutb Minar, near, Iron Pillar of Delhi]
-
A.
Rajabai Clock Tower
Rajabai Clock Tower is a historic 19th-century Gothic Revival clock tower and prominent landmark located within the Fort campus of the University of Mumbai in Mumbai, India.
-
B.
Red Fort
The Red Fort is a historic 17th-century sandstone fortress in Delhi, India, that served as the main residence of Mughal emperors and now stands as a prominent symbol of India's heritage and independence.
-
C.
Allahabad Fort
Allahabad Fort is a massive 16th-century Mughal fortress on the banks of the Ganges in Prayagraj, India, renowned for its impressive architecture and strategic historical significance.
-
D.
Gateway of India
The Gateway of India is a monumental arch in Mumbai built during the British colonial era, serving as a historic waterfront landmark and popular tourist attraction overlooking the Arabian Sea.
-
E.
Agra Fort
Agra Fort is a massive 16th-century Mughal fortress in Agra, India, renowned for its red sandstone architecture and historical significance as the main residence of the Mughal emperors.
- 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: Iron Pillar of Delhi Target entity description: The Iron Pillar of Delhi is an ancient, corrosion-resistant wrought iron column from the Gupta period, renowned for its metallurgical sophistication and historical inscriptions.
-
A.
Rajabai Clock Tower
Rajabai Clock Tower is a historic 19th-century Gothic Revival clock tower and prominent landmark located within the Fort campus of the University of Mumbai in Mumbai, India.
-
B.
Red Fort
The Red Fort is a historic 17th-century sandstone fortress in Delhi, India, that served as the main residence of Mughal emperors and now stands as a prominent symbol of India's heritage and independence.
-
C.
Allahabad Fort
Allahabad Fort is a massive 16th-century Mughal fortress on the banks of the Ganges in Prayagraj, India, renowned for its impressive architecture and strategic historical significance.
-
D.
Gateway of India
The Gateway of India is a monumental arch in Mumbai built during the British colonial era, serving as a historic waterfront landmark and popular tourist attraction overlooking the Arabian Sea.
-
E.
Agra Fort
Agra Fort is a massive 16th-century Mughal fortress in Agra, India, renowned for its red sandstone architecture and historical significance as the main residence of the Mughal emperors.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
ancient iron column
ⓘ
archaeological site ⓘ historical monument ⓘ |
| associatedRuler | Chandragupta II ⓘ |
| baseFeature | buried below ground level ⓘ |
| constructionType | solid iron shaft ⓘ |
| continent | Asia ⓘ |
| corrosionResistanceReason |
absence of modern impurities such as magnesium
ⓘ
high phosphorus content ⓘ low sulfur content ⓘ protective passive film of iron hydrogen phosphate hydrate ⓘ |
| country | India ⓘ |
| crossSection | circular ⓘ |
| culture | Gupta Empire ⓘ |
| dedicatedTo | Vishnu ⓘ |
| estimatedDate |
4th century CE
ⓘ
circa 402 CE ⓘ |
| governingBody | Archaeological Survey of India ⓘ |
| hasInscriptions | yes ⓘ |
| height | about 7.2 metres ⓘ |
| heightAboveGround | about 6.7 metres ⓘ |
| heritageDesignation | protected monument of national importance in India ⓘ |
| historicalPeriod |
Gupta Empire
ⓘ
surface form:
Gupta period
|
| inscriptionContent | eulogy of a king named Chandra ⓘ |
| inscriptionLanguage | Sanskrit ⓘ |
| inscriptionScript |
Brahmi script
ⓘ
Gupta script ⓘ |
| locatedIn | Qutb complex ⓘ |
| location |
Delhi
ⓘ
Mehrauli ⓘ |
| manufacturingTechnique |
forge welding
ⓘ
wrought iron forging ⓘ |
| material | wrought iron ⓘ |
| nearbyMonument |
Qutb Minar
ⓘ
Quwwat-ul-Islam Mosque ⓘ |
| notableFor |
Gupta period metallurgy
ⓘ
Sanskrit inscription ⓘ corrosion resistance ⓘ |
| originalFunction |
Vishnu dhvaja
ⓘ
victory pillar ⓘ |
| region | National Capital Territory of Delhi ⓘ |
| religiousAssociation | Hinduism ⓘ |
| researchField |
archaeometallurgy
ⓘ
corrosion science ⓘ |
| surfaceFeature |
Garuda figure formerly on top
ⓘ
decorative bell-shaped capital ⓘ thin layer of rust ⓘ |
| touristAttraction | yes ⓘ |
| UNESCOTentativeListStatus | on UNESCO World Heritage tentative list as part of Qutb Minar and its Monuments ⓘ |
| weight | over 6 tonnes ⓘ |
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: Iron Pillar of Delhi Description of subject: The Iron Pillar of Delhi is an ancient, corrosion-resistant wrought iron column from the Gupta period, renowned for its metallurgical sophistication and historical inscriptions.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Quwwat-ul-Islam Mosque