Jantar Mantar of Jaipur in Rajasthan is the biggest stone observatory in the world, which is still in a running condition and stands witness to the wisdom of the former age. Jantar Mantar of Jaipur in Rajasthan is one of the five astronomical observatories built by Maharaja Jai Singh, the founder of Jaipur of Rajasthan and is located close to the gate of the famous City Palace of Jaipur of Rajasthan. The Jantar Mantar at Jaipur of Rajasthan was conceived as a quest for discovering the mysteries of the Cosmos. It was built not only to verify astronomical observations made at Jaipur of Rajasthan, but also to stimulate interest in astronomy, which had become enmeshed in theory, superstition and religious jargon. During the period between 1727 and 1733, Jantar Mantar of Rajasthan took its form and structure.
The Man has always been fascinated by the Universe and the Cosmos. With every passing year we think we have come closer to unfolding the secrets of the dark skies. But just as we think we are close to discovering the key or the knowledge, we realize we haven't even crossed the threshold yet. Even our ancestors and the people before us, could not resist the temptation and made attempts to learn more about the mysteries of Time and Space.