Astronomical Observatories of Jai Singh

E304516

UNESCO World Heritage Site group of astronomical observatories

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.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (5)

Label	Occurrences
Jantar Mantar observatories	2
Astronomical Observatories of Jai Singh canonical	1
Astronomical Observatories of Jai Singh II	1
Jai Singh II’s observatories	1
Jai Singh observatories	1

How this entity was disambiguated

This entity first appeared as the object of triple T2838547 — 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: Astronomical Observatories of Jai Singh
Context triple: [Jantar Mantar, Jaipur, partOf, Astronomical Observatories of Jai Singh]

A. 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.
B. 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.
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. 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.
E. Madras Observatory
Madras Observatory was a historic astronomical observatory in colonial India that played a key role in timekeeping, celestial observations, and the development of regional standard time.
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: Astronomical Observatories of Jai Singh
Target entity description: 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.

A. 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.
B. 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.
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. 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.
E. Madras Observatory
Madras Observatory was a historic astronomical observatory in colonial India that played a key role in timekeeping, celestial observations, and the development of regional standard time.
F. None of above. chosen

Statements (52)

Predicate	Object
instanceOf	UNESCO World Heritage Site ⓘ group of astronomical observatories ⓘ
architect	Maharaja Sawai Jai Singh II ⓘ linked to: Maharaja Jai Singh II
architecturalStyle	observatory architecture ⓘ
builder	Maharaja Sawai Jai Singh II ⓘ linked to: Maharaja Jai Singh II
coordinateSystem	altazimuth system ⓘ ecliptic system ⓘ equatorial system ⓘ
country	India ⓘ
hasInstrumentType	armillary-type instrument ⓘ gnomon ⓘ meridian circle ⓘ quadrant ⓘ sundial ⓘ
hasPart	Jantar Mantar, Delhi ⓘ linked to: Jantar Mantar, New Delhi Jantar Mantar, Jaipur ⓘ Jantar Mantar, Mathura ⓘ Jantar Mantar, Ujjain ⓘ Jantar Mantar, Varanasi ⓘ
heritageDesignation	UNESCO World Heritage Site ⓘ World Heritage Site No.1338 ⓘ
inception	early 18th century ⓘ
locatedIn	Delhi ⓘ India ⓘ Jaipur ⓘ Madhya Pradesh (for Ujjain observatory) ⓘ linked to: Jantar Mantar, Ujjain Mathura ⓘ National Capital Territory of Delhi (for Delhi observatory) ⓘ Rajasthan (for Jaipur observatory) ⓘ Ujjain ⓘ Uttar Pradesh (for Varanasi and Mathura observatories) ⓘ Varanasi ⓘ
material	marble ⓘ masonry ⓘ stone ⓘ
namedAfter	Maharaja Sawai Jai Singh II ⓘ linked to: Maharaja Jai Singh II
notableFor	high precision naked-eye observations ⓘ integration of architecture and astronomy ⓘ large-scale fixed astronomical instruments ⓘ
partOf	scientific heritage of India ⓘ
significantPeriod	18th century ⓘ
startTime	1720s ⓘ
UNESCOcategory	Cultural ⓘ
UNESCOcriteria	(ii) ⓘ (iv) ⓘ
UNESCOinscriptionYear	2010 ⓘ
UNESCOregion	Asia and the Pacific ⓘ linked to: Asia-Pacific
usedFor	astrological calculations ⓘ astronomical observation ⓘ calendar construction ⓘ naked-eye astronomical measurements ⓘ timekeeping ⓘ

How these facts were elicited