The Jaipur observatory is by far the most elaborate and complete of Jai Singh’s projects, comprising sixteen masonry instruments and six made of metal. The observatory occupies a plot of land just outside the City Palace, within the walls of the original city.
The observatory includes a number of instruments that are not duplicated at the other sites. These include the Kappala Yantra, Rasivalaya Yantras, and Unnatamsha Yantra.