Jantar Mantar, Ujjain
E306142
Jantar Mantar, Ujjain is a historic 18th-century astronomical observatory in Ujjain, India, featuring large masonry instruments used for precise naked-eye observations of celestial bodies.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Jantar Mantar, Ujjain canonical | 5 |
| Madhya Pradesh (for Ujjain observatory) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2838549 — 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, Ujjain Context triple: [Jantar Mantar, Jaipur, relatedWork, Jantar Mantar, Ujjain]
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A.
Jantar Mantar, Mathura
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.
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B.
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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C.
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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D.
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.
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E.
Astronomical Observatories of Jai Singh
The Astronomical Observatories of Jai Singh are a group of early 18th-century masonry observatories in India, built by Maharaja Jai Singh II for precise naked-eye astronomical measurements and now recognized as UNESCO World Heritage sites.
- 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, Ujjain Target entity description: Jantar Mantar, Ujjain is a historic 18th-century astronomical observatory in Ujjain, India, featuring large masonry instruments used for precise naked-eye observations of celestial bodies.
-
A.
Jantar Mantar, Mathura
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
Astronomical Observatories of Jai Singh
The Astronomical Observatories of Jai Singh are a group of early 18th-century masonry observatories in India, built by Maharaja Jai Singh II for precise naked-eye astronomical measurements and now recognized as UNESCO World Heritage sites.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical observatory
ⓘ
heritage site ⓘ |
| access | open to visitors ⓘ |
| architecturalStyle | masonry observatory ⓘ |
| builtFor | naked-eye observations ⓘ |
| category | observatories in India ⓘ |
| cityRole | supports Ujjain’s status as an ancient astronomical center ⓘ |
| constructionPeriod | 18th century ⓘ |
| coordinateSystemUsed |
ecliptic coordinate system
ⓘ
equatorial coordinate system ⓘ |
| country | India ⓘ |
| culturalContext |
Hindu astronomy
ⓘ
Indian astrology ⓘ |
| era | early modern India ⓘ |
| function |
determination of celestial positions
ⓘ
measurement of local time ⓘ prediction of eclipses ⓘ |
| hasPart |
armillary-type instruments
ⓘ
gnomon ⓘ quadrant ⓘ sundial ⓘ |
| heritageDesignation | protected monument ⓘ |
| locatedIn |
Madhya Pradesh
ⓘ
Ujjain ⓘ |
| locatedNear | Tropic of Cancer ⓘ |
| locatedOn |
Malwa Plateau
ⓘ
surface form:
Malwa plateau
|
| materialUsed |
brick
ⓘ
lime mortar ⓘ stone ⓘ |
| notableFeature | large masonry instruments ⓘ |
| observationMethod | naked-eye observation ⓘ |
| observes |
Moon
ⓘ
Sun ⓘ fixed stars ⓘ planets ⓘ |
| operatedBy | Archaeological Survey of India ⓘ |
| relatedTo |
Jantar Mantar, New Delhi
ⓘ
surface form:
Jantar Mantar, Delhi
Jantar Mantar, Jaipur ⓘ |
| significance | historical center of astronomical studies in India ⓘ |
| tourismType |
cultural tourism
ⓘ
scientific tourism ⓘ |
| usedFor |
astrology
ⓘ
astronomical observations ⓘ calendar calculations ⓘ time measurement ⓘ |
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, Ujjain Description of subject: Jantar Mantar, Ujjain is a historic 18th-century astronomical observatory in Ujjain, India, featuring large masonry instruments used for precise naked-eye observations of celestial bodies.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Madhya Pradesh (for Ujjain observatory)