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Gallery: Jantar Mantar astronomical instruments of ancient India

Jantar Mantar is an array of Indian astronomical instruments. It consists of 13 architectural astronomy instruments. The observatory is made up of geometric devices in the form of what appears to be modern architecture. These are for measuring time, predicting eclipses and tracking stars. The Maharaja Jai Singh II had built a total of five such facilities in India, including the ones at New Delhi, Ujjain, Mathura and Varansiand, though the Jaipur observatory is the largest and best preserved.

Visitors look towards a structure at Jantar Mantar in New Delhi on July 17, 2018. The Jantar Mantar site in New Delhi, which consists of 13 architectural astronomy instruments, was built by Maharaja Jai Singh II of Jaipur from 1724 onwards and was used in the Mughal era to make astronomical calculations and calendar revisions.

Visitors stand near a structure at Jantar Mantar in New Delhi.

Visitors takes selfie pictures near a structure at Jantar Mantar in New Delhi.

An Indian visitor takes pictures from her mobile phone as she walks past a structure at Jantar Mantar in New Delhi.

An Indian couple sit on a structure at Jantar Mantar in New Delhi.

A private security guard patrols near a structure at Jantar Mantar in New Delhi.

An Indian visitor speaks on her mobile phone as she walks past a structure at Jantar Mantar in New Delhi.

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