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Jai Singh was born at Amber in 1688 and came to the throne at twelve. The observatory is the clearest surviving evidence that Jaipur was conceived as a scientific project.
A masonry astronomical observatory of large-scale instruments, including twelve Rasivalayas, built by Jai Singh II. He built instruments rather than adopting the telescope, aiming at a systematic picture of the whole sky and the systems governing it.
Inscribed as a UNESCO World Heritage Site in 2010.
