|  |        The Jantar Mantar Astronomical Observatory, the final architectural undertaking of Raja Jai Singh II, saw its origins in Delhi, 1724.  Amid his royal duties as king and warrior, Jai Singh was also an intelligent mathematician and scholar of the cosmos.  To this day, the Samrat Yantra (supreme instrument), a right-angled triangle with a sun-dial dome, is “accurate to half a second.”  Based on these precise measurements and the disposition of the planets and stars, Jai Singh moved his capital from Amber to Jaipur in 1727.
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