Jantar Mantar is an astronomical observatory built by Raja Jai Singh II in 18th century. Check out detailed information on history, architecture, and visiting hours of Jantar Mantar.
Jantar Mantar Jaipur

History
Maharaja Jai Singh II, the founder of the 'pink city', was a great scholar and an avid astrologer. He studied philosophy, astrology, architecture and religion in various schools, and was also well versed with universal mathematical concepts such as Euclid's Clements, Ptolemy's Syntaxes and the Master works of Aryabhatta. In the year 1718, he wanted to construct an observatory of renown. For this, he studied the subject of astronomy and then built five different observatories around North India. At these places, he would sit with other scholarly astronomers, such as Pt. Kedarnath, for astronomical observations. The 'Jantar Mantar' at Jaipur, being the biggest conservatory in the country, was renovated time and again and houses various instruments that offer precise measurements of time, the azimuth, declination of the sun and the positions of constellations, along with several other astronomical phenomena. The Jaipur observatory was functional for seven years only, as the Maharaja was not very successful in deriving accurate, astronomical observations.
Architecture
The astronomical observatory consists of fourteen major geometric devices for measuring time, tracking constellations and, even for, observing the orbits around the sun. Popular structures within the Jantar Mantar are the 'Samrat Yantra' (the world's largest sundial), the 'Hindu Chhatri', the 'Jaiprakash Yantra' and various geometric structures with astronomical devices to probe the 'universe'.
Nearby Tourist Attractions
- Jaipur City Palace
- Jaigarh Fort
- Galta Monkey Temple
The Jantar Mantar is a resplendent reminder of the royal heritage of Jaipur and stands as a royal testimony to a former epoch. The magnificent structure still manages to capture the attention of tourists and astronomy enthusiasts alike! The Jantar Mantar is an intriguing structure, and is a must-see in Jaipur!