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Woman working on a building site. Of the estimated 30 million construction workers in India 51% are women. They are almost unskilled labourers and they face serious problems related to work, wage discrimination, gender and sexual harassment, unhealthy job relationship, lower wages. Their skills are never upgraded as they are allowed to perform only certain types of work and usually they assist the male work force.
The Jantar Mantar is a collection of nineteen architectural astronomical instruments built by the Rajput king Sawai Jai Singh II, the founder of Jaipur, Rajasthan. The monument was completed in 1734. It features the world's largest stone sundial, and is a UNESCO World Heritage site. The instruments allow the observation of astronomical positions with the naked eye. The observatory is an example of the Ptolemaic positional astronomy which was shared by many civilizations.