Jantar
Mantar Jantar Mantar is the most famous and elaborate observatory
of its time.

It
was constructed in the year 1724 A.D. by Sawai Jai Singh II, even before the
city of Jaipur was built, and has been described as the most surrealistic and
logical landscape instone.
It was built to measure the local time, the sun's declination,
altitude, the declination of stars, planets and to determine eclipses.
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