Jantar Mantar, Mathura
E113777
Jantar Mantar, Mathura is an 18th-century astronomical observatory in Uttar Pradesh, India, built by Maharaja Sawai Jai Singh II for precise celestial observations and timekeeping.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Jantar Mantar, Mathura canonical | 5 |
| Jantar Mantar | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T932821 — 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: Jantar Mantar, Mathura Context triple: [Jantar Mantar, New Delhi, relatedTo, Jantar Mantar, Mathura]
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A.
Jantar Mantar, Varanasi
Jantar Mantar, Varanasi is an 18th-century astronomical observatory in Varanasi, India, featuring masonry instruments built by Maharaja Jai Singh II for precise celestial observations and timekeeping.
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B.
Jantar Mantar, Jaipur
Jantar Mantar, Jaipur is an early 18th-century astronomical observatory in Rajasthan, India, renowned for its large masonry instruments used to measure time and track celestial bodies and recognized as a UNESCO World Heritage Site.
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C.
Jantar Mantar, New Delhi
Jantar Mantar, New Delhi is an 18th-century astronomical observatory built by Maharaja Jai Singh II, featuring large masonry instruments used for precise naked-eye observations of celestial bodies.
-
D.
Tara Mandir Planetarium
Tara Mandir Planetarium is a popular astronomical attraction in Porbandar, India, featuring educational shows and exhibits about space and celestial phenomena.
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E.
Jama Masjid, Ahmedabad
Jama Masjid in Ahmedabad is a 15th-century mosque renowned for its grand Indo-Islamic architecture and historical significance as one of the city's most important religious and cultural monuments.
- 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: Jantar Mantar, Mathura Target entity description: Jantar Mantar, Mathura is an 18th-century astronomical observatory in Uttar Pradesh, India, built by Maharaja Sawai Jai Singh II for precise celestial observations and timekeeping.
-
A.
Jantar Mantar, Varanasi
Jantar Mantar, Varanasi is an 18th-century astronomical observatory in Varanasi, India, featuring masonry instruments built by Maharaja Jai Singh II for precise celestial observations and timekeeping.
-
B.
Jantar Mantar, Jaipur
Jantar Mantar, Jaipur is an early 18th-century astronomical observatory in Rajasthan, India, renowned for its large masonry instruments used to measure time and track celestial bodies and recognized as a UNESCO World Heritage Site.
-
C.
Jantar Mantar, New Delhi
Jantar Mantar, New Delhi is an 18th-century astronomical observatory built by Maharaja Jai Singh II, featuring large masonry instruments used for precise naked-eye observations of celestial bodies.
-
D.
Tara Mandir Planetarium
Tara Mandir Planetarium is a popular astronomical attraction in Porbandar, India, featuring educational shows and exhibits about space and celestial phenomena.
-
E.
Jama Masjid, Ahmedabad
Jama Masjid in Ahmedabad is a 15th-century mosque renowned for its grand Indo-Islamic architecture and historical significance as one of the city's most important religious and cultural monuments.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical observatory
ⓘ
heritage site ⓘ |
| architect |
Maharaja Jai Singh II
ⓘ
surface form:
Maharaja Sawai Jai Singh II
|
| architecturalStyle | observatory architecture ⓘ |
| associatedWith |
Rajput rulers of Jaipur
ⓘ
history of Mathura ⓘ |
| builder |
Maharaja Jai Singh II
ⓘ
surface form:
Maharaja Sawai Jai Singh II
|
| category |
18th-century architecture in India
ⓘ
buildings and structures in Mathura ⓘ observatories in India ⓘ |
| continent | Asia ⓘ |
| coordinateSystemUsed | celestial coordinate system ⓘ |
| country | India ⓘ |
| culturalSignificance | example of pre-telescopic observational astronomy in India ⓘ |
| foundedBy |
Maharaja Jai Singh II
ⓘ
surface form:
Sawai Jai Singh II
|
| hasSubject |
astronomy
ⓘ
history of science in India ⓘ traditional Indian astronomy ⓘ |
| heritageDesignation | historical monument ⓘ |
| heritageStatus | protected monument (state level) ⓘ |
| inception | 18th century ⓘ |
| languageOfOfficialName |
English
ⓘ
Hindi ⓘ |
| locatedIn |
Mathura
ⓘ
northern India ⓘ
surface form:
North India
Uttar Pradesh ⓘ |
| locatedInTimeZone | Indian Standard Time ⓘ |
| locatedOn |
South Asia
ⓘ
surface form:
Indian subcontinent
|
| material |
masonry
ⓘ
stone ⓘ |
| measurementType |
positions of celestial bodies
ⓘ
solar time ⓘ |
| namedAfter |
Jantar Mantar, Mathura
self-linksurface differs
ⓘ
surface form:
Jantar Mantar
|
| operator | local authorities of Mathura ⓘ |
| partOf |
Astronomical Observatories of Jai Singh
ⓘ
surface form:
Jai Singh observatories
series of Jantar Mantar observatories ⓘ |
| purpose |
astrometry
ⓘ
astronomical observation ⓘ calendar calculations ⓘ celestial observations ⓘ timekeeping ⓘ |
| significantPeriod | 18th century ⓘ |
| use |
cultural heritage
ⓘ
scientific education ⓘ tourism ⓘ |
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: Jantar Mantar, Mathura Description of subject: Jantar Mantar, Mathura is an 18th-century astronomical observatory in Uttar Pradesh, India, built by Maharaja Sawai Jai Singh II for precise celestial observations and timekeeping.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Jantar Mantar