The UNESCO has declared Jaipur�s Jantar Mantar as World Heritage Site. The decision to declare Jantar Mantar as World Heritage Site was taken at a high-level meeting of unesco officials in Brazil.

It is on sitting in Brasilia, Brazil; the 34th session of World Heritage Committee of UNESCO approved the inscription of famous Jantar Mantar observatory of Jaipur on the World Heritage list in 'Cultural' category.

Out of 38 entries received for inscription from across the globe six were finally included in the list. This is the only world heritage site of state of Rajasthan in 'cultural' category.

The Jantar Mantar observatory was constructed between 1728-1734 AD during the reign of Maharaja Sawai Jai Singh IInd. The observatory follows the 'Sun (Surya) Siddhanta and it is claimed that even today its instruments forecast many elements of weather and astronomy, exactly.