Jantar Mantar is an assembly of stone-built astronomical instruments for measuring the harmony of the heavens. Maharaja Jaisingh of Jaipur built five of them from 1723 onwards. They were built in New Delhi, Jaipur, Ujjain, Mathura and Varanasi. The purpose of the observatory was to compile astronomical tables and predict the movements of the Sun, Moon and planets.

The one in Delhi was the first to be built and consists of 13 architectural astronomical instruments. The image of Mishra Yantra, one of the four distinct astronomical instruments of the Jantar Mantar, New Delhi, was the logo of the 1982 Asian Games, held in New Delhi.