The jantar mantar is located in the modern city of New Delhi. It consists of 13 architectural astronomy instruments. There is a plaque fixed on one of the structures in the Jantar Mantar observatory which was placed there in 1910 mistakenly dating the construction of the complex to the year 1710. Later research, suggests 1724 as the actual year of construction. The site is one of five built by the Maharaja Jai Singh II of Jaipur.
Jantar Mantar
