English: The observatory of Jantar Mantar in Delhi is a camouflage of modern art. ‘Samrat Yantra' or the sun dial is the most imposing instrument in the observatory. The sun dial is a huge structure in yellow with a 27m long arm placed at an angle of 27 degrees. The sun dial calculates the time of a day accurately. There are two pillars that record the longest and shortest day in the year. This instrument is known as the ‘Mishra Yantra' the other instruments are used to trace astronomical phenomena from other planets and stars. The observatory is a fascinating sight with huge instruments of masonry.