<P> The Jantar Mantar monument in Jaipur , Rajasthan is a collection of nineteen architectural astronomical instruments built by the Rajput king Sawai Jai Singh II , and completed in 1734 . It features the world 's largest stone sundial , and is a UNESCO World Heritage site . It is located near City Palace and Hawa Mahal . The instruments allow the observation of astronomical positions with the naked eye . The monument expresses architectural innovations , as well as the coming together of ideas from different religious and social beliefs in 18th - century India . The observatory is an example of the Ptolemaic positional astronomy which was shared by many civilizations . </P>
<P> The Jantar Mantar monument in Jaipur , Rajasthan is a collection of nineteen architectural astronomical instruments built by the Rajput king Sawai Jai Singh II , and completed in 1734 . It features the world 's largest stone sundial , and is a UNESCO World Heritage site . It is located near City Palace and Hawa Mahal . The instruments allow the observation of astronomical positions with the naked eye . The monument expresses architectural innovations , as well as the coming together of ideas from different religious and social beliefs in 18th - century India . The observatory is an example of the Ptolemaic positional astronomy which was shared by many civilizations . </P>
who built the jantar mantar observation in jaipur and delhi
who built the jantar mantar observation in jaipur and delhi
Sawai Jai Singh II
Sawai Jai Singh II