Historical Photos of 1724 AD Built Jantar Mantar, Delhi India. The Jantar Mantar of Delhi is only one of the five observatories built by Sawai Jai Singh II, the other four being located at Jaipur, Varanasi, Ujjain and Mathura.
All of these were built as far back as AD 1724-1730 during the period generally known as the dark age of Indian history, when the last great Mughal emperor Aurangzeb had died and the Mughal Empire was declining rapidly.
During this period of chaos, Muhammad Shah ascended the throne of the Mughal Empire. As many enemies surrounded him, he sought the alliance of the Hindu rulers.
Of these, the most notable was Sawai Jai Singh II of Amber, who came into limelight since the days of Aurangzeb. When Jai Singh ascended the throne of Amber in 1699, he was barely eleven, but sharp and shrewd far beyond his years.
The then Mughal emperor Aurangzeb was so impressed with the young ruler that he gave Jai Singh II the title of Sawai, meaning one and a quarter of an average man in worth.
As Jai Singh repeatedly proved himself as a worthy ally of the Mughals, Muhammad Shah, who was seeking a dependable ally, zeroed in on Jai Singh and duly raised him to the rank of governor of Agra and later, of Malwa.
Jai Singh was passionate about two things-the arts and the sciences, chiefly astronomy. Once, at the court of Muhammad Shah, he found the Hindu and Muslim astrologers embroiled in a heated argument over certain planetary positions.
It was imperative that the positions be known accurately to determine an auspicious hour for the emperor to set out on an expedition. Jai Singh offered to rectify the then available astronomical tables, an offer that was readily accepted by the Mughal emperor.
The result: an onsite Jantar Mantar in Delhi, an astronomical observatory where the movements of sun, moon and planets could be observed.
Jai Singh’s idea was to create a renaissance in practical astronomy among the Indian masses and practicing astronomers. However, the lofty ideals of the Jantar Mantar remained unfulfilled as the country at that time was in turmoil and the full potential of this observatory was never realized.
To start with, Jai Singh tried to use brass instruments in this observatory, but soon gave them up because of several inherent flaws. They were too small, for one thing, their axes were unstable so the center often got displaced.
He next decided to follow the style adopted by the renowned Arab astronomer, Prince Ulugh Beg, builder of the famous 15th-century observatory at Samarkand, Uzbekistan.
The massive masonry instruments at Samarkand suited Jai Singh’s architectural tastes and promised to be more accurate because of sheer size. In 1730, Jai Singh sent a mission to the king of Lisbon.
On its return to Jaipur, the mission brought back a telescope and no less a person than the court astronomer himself, by the name of Xavier de Silva.