Janter Manter is not just a simple observatory it is vision of Maharaja Swai Jai Singh who wanted to see how he can check his knowledge on scientific grounds. He got this knowledge in heritated to him from his mother. He tried making first small sun dial in Amber when he was the ruler of Amber, then rest all five observatories were built. Location of Jaipur observatory explains all about his passion towards stars & planets. It was built close to City Palace old official residence of Maharaja so that he can walk there any time.