Jai Singh II - Contributions To Society, Culture, and Science

Contributions To Society, Culture, and Science

Sawai Jai Singh was the first Hindu ruler in centuries to perform the ancient Vedic ceremonies like the Ashwamedha (1716) sacrifices — and the Vajapeya (1734) on both occasions vast amounts were distributed in charity. Being initiated in the Nimbarka Sampradaya of the Vaishnav religion, he also promoted Sanskrit learning and initiated reforms in Hindu society like the abolition of Sati and curbing the wasteful expenditures in Rajput weddings. It was at Jai Singh’s insistence that the hated jaziya tax, imposed on the Hindu population by Aurangzeb (1679), was finally abolished by the Emperor Muhammad Shah in 1720. In 1728 Jai Singh prevailed on him to also withdraw the pilgrimage tax on Hindus at Gaya.

In 1719, he was witness to a noisy discussion in the court of Mughal Emperor Muhammad Shah. The heated debate regarded how to make astronomical calculations to determine an auspicious date when the emperor could start a journey. This discussion led Jai Singh to think that the nation needed to be educated on the subject of astronomy. It is surprising that in the midst of local wars, foreign invasions, and consequent turmoil, Sawai Jai Singh found time and energy to build astronomical observatories.

Five observatories were built at Delhi, Mathura (in his Agra province), Benares, Ujjain (capital of his Malwa province), and his own capital of Jaipur. Only the one at Jaipur is still operational. Relying primarily on Indian astronomy, these buildings were used to accurately predict eclipses and other astronomical events. The observational techniques and instruments used in his observatories were also superior to those used by the European Jesuit astronomers he invited to his observatories. Termed as the Jantar Mantar they consisted of the Ram Yantra (a cylindrical building with an open top and a pillar in its center), the Jai Prakash (a concave hemisphere), the Samrat Yantra (a huge equinoctial dial), the Digamsha Yantra (a pillar surrounded by two circular walls), and the Narivalaya Yantra (a cylindrical dial).

The Samrat Yantra is a huge sundial. It can be used to estimate the local time, to locate the Pole Star, and to measure the declination of celestial objects. The Rama Yantra can be used to measure the altitude and azimuth of celestial objects. The Shanku Yantra can be used to measure the latitude of the place.

Jai Singh's greatest achievement was the construction of Jaipur city (known originally as Jainagara (in Sanskrit, as the 'city of victory' and later as the 'pink city' by the British by the early 20th century), the planned city, later became the capital as the Indian state of Rajasthan. Construction of the new capital began as early as 1725 although it was in 1727 that the foundation stone was ceremonially laid, and by 1733 Jaipur officially replaced Amber as capital of the Kachawahas. Built on the ancient Hindu grid pattern, found in the archaeological ruins of 3000 BCE, it was designed by the Brahmin Vidyadhar who was educated in the ancient Sanskrit manuals (silpa-sutras) on city-planning and architecture. Merchants from all over India settled down in the relative safety of this rich city, protected by thick walls, and a garrison of 17,000 supported by adequate artillery.

The rajah also translated works by people like John Napier. For these multiple achievements Sawai Jai Singh II is remembered even to this date, as the most enlightened king of 18th Century India. These days Jai Singh's observatories at Jaipur, Varanasi, and Ujjain are functional. Only the one at Delhi is not functional and that at Mathura disappeared long time ago.