Jantar Mantar 

, Hazrat-E-Dilli

Between 1727 and 1734 Maharajah Jai Singh II of Jaipur constructed five astronomical observatories in west central India. The observatories, or “Jantar Mantars” as they are commonly known, incorporate multiple buildings of unique form, each with a specialized function for astronomical measurement.The Misra Yantra , the Samrat Yantra, JaiPrakash Yantra and Ram Yantea

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