Samrat Yantra

The Samrat Yantra (giant sundial) at the Jaipur Observatory

Between 1724 and 1730 Maharajah Sawaii Jai Singh II of Jaipur constructed five astronomical observatories in north India. The observatories, or "Jantar Mantars" as they are commonly known, incorporate multiple buildings of unique form, each with a specialized function for astronomical measurement. These structures with their striking combinations of geometric forms at large scale.
jantarmantar.org presents the observatories through a variety of media, making it possible to explore and learn about these historic sites through interactive panoramic tours, time lapse sequences, and 3D models as well as articles, drawings, and historic texts. It is a comprehensive resource for exploring the observatories in depth.

Welcome to the new jantarmantar.org!
The redesigned website was launched in October 2015 - and we are still hard at work refining the content and tweaking the design. As new pages and features are added, they will be announced through our Facebook and Instagram pages, so follow us there!

New to jantarmantar.org is the Learn section, featuring a wealth of information about the observatories and the unique instruments Jai Singh created to observe celestial objects.
But more than that, the Learn section also features projects you can do to learn more about the observatories and sky observation without a telescope.

The Tours section features all new panoramic virtual tours that work on desktops, laptops, and mobile devices!

And the redesigned Gallery will be presenting curated collections of photographs, panoramas, 3D models, and animations in a portfolio format.

Recent additions:
We’ve added a project to the Learn section that features panoramas customized to work with the free open source planetarium software Stellarium. Now you can view the night sky from the Jantar Mantar!
More…

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