Jantar Mantar

Jantar Mantar, Jaipur is one of India's most significant historic astronomical observatories. Built in the early 18th century under Maharaja Sawai Jai Singh II, the site contains monumental astronomical instruments designed for naked-eye observation of celestial bodies.

The observatory includes instruments for measuring time, observing the position of celestial objects and determining astronomical coordinates. Its monumental scale allowed greater precision in astronomical observations.

The site is particularly famous for the Brihat Samrat Yantra, a monumental sundial. Rajasthan Tourism describes Jantar Mantar as having 19 astronomical instruments, while UNESCO describes the property as a set of around 20 main fixed instruments

Jantar Mantar was built by Maharaja Sawai Jai Singh II, the ruler who founded Jaipur. Construction began in the 18th century and was completed around 1738. Jai Singh II had a strong interest in astronomy, mathematics and scientific observation, and developed several observatories across India.

Explore one of India's most important historic astronomical observatories.
See the world's largest stone sundial, the Brihat Samrat Yantra.
Learn how traditional astronomical instruments were used.
Experience the combination of science, architecture and history.
Visit a UNESCO World Heritage Site.
See monumental instruments designed for naked-eye astronomical observation.

Explore the astronomical instruments.
See the Brihat Samrat Yantra.
Learn how the instruments measure time and celestial positions.
Take photographs of the monumental structures.
Take a guided tour or use an audio guide.
Learn about traditional Indian astronomical practices.