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Jantar Mantar
The Maharaja of Jaipur Sawai Jay Singh II founded it.
A little distance of Connaught Circus at Sansad Marg it was built in 1725.

It is space observatory a house that is instrumental in observing astronomical
and aeronotical movements of sun, moon and other stars and planets.
The huge Prince Dial is unique. It is next to that similar one in Jaipur in
size and grade.
There are other Jantar-Mantars in Ujjain, Varanasi and Mathura.
Open from 9-00 to 19-00. There is one Bhairab Temple as old as Jantar-Mantar.
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