Keywords: Samrat Yantra and Jai-Prakash Yantra, Jantar Mantar, Delhi, early 19th century.jpg en Samrat Yantra and behind it the Jai-Prakash Yantra which consists of two concave hemispherical structures used to measure the sun's position of the sun and other celestial bodies Jantar Mantar Delhi early 19th century http //www bl uk/onlinegallery/onlineex/apac/other/019xzz000004325u00019000 html The British Library Creator Thomas Daniell Creator William Daniell early 18th century PD-old-100 Jantar Mantar Delhi Thomas Daniell William Daniell Delhi in the 1800s 1800s paintings from India 19th-century paintings of buildings 19th-century paintings location missing Template artwork possible |