Jantar Mantar

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Jantar Mantar


Jantar Mantar at Jaipur is a stone observatory that is the largest in the world. Jantar Mantar of Jaipur is one of the five astronomical observatories built by Maharaja Jai Singh, the founder of Jaipur, between 1727 and 1733. The term 'Jantar Mantar' is derived from the Sanskrit word-'Yantra Mantra' meaning instruments and formulae. The 'Yantra Mantra' literally means 'Magical Device'.

Being a reputed astronomer, Jai Singh was commissioned by Emperor Muhammad Shah, to correct the astronomical tables and to confirm the data that was available on the planetary positions. He took nearly seven years to finish the Jantar Mantar. The observatory is constructed on the data available in La Hire’s “Tables” and is believed to be more accurate then the Table itself. It was restored in 1901 and in 1948 the famous observatory was declared a national monument.

Jantar Mantar is wholly constructed with stone and marble. The observatory consists of fourteen geometric devices for measuring the time of the day, the heights of heavenly bodies, predicting eclipses and the situations of constellations. The function of each instrument is rather complex but serves a particular function where time plays the main theme. The Samrat Yantra, for instance, which is a sundial, can be used to tell the time to an accuracy of about two seconds in Jaipur local time. The sundial is 27.4m high and is still used on the Guru Purnima (full moon day in the month of Jul/Aug) to forecast the onset of monsoon. These observatories have fascinated historians, architects, artists and astronomers not just in India, but all over the world.

Today, Jantar Mantar has become a major tourist attraction in Jaipur.

Best time to visit

The best time to visit Jaipur is between October and March. During this period, the heat of the desert sun is less intense, the weather is cool and it is the best season for a trip to Jaipur.


Do not miss out the opportunity to check out Jantar Mantar, the most famous one among the five observatories built by Sawai Jai Singh. It is one of the biggest stone observatories in the world, which is still running and stands witness to the wisdom of the former age.

The sundial at Jantar Mantar has a time accuracy of 2 seconds!


Jantar Mantar can be visited between 9:00 am to 4:30 pm.

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