The prefix ‘Jantar’ of the name Jantar Mantar, is the altered form of the word ‘Jantra’, which was derived from the word ‘Yantra’, that is called an ‘Instrument’ in English. The second word ‘Mantar’ has originated from the term ‘Mantrana’, that means ‘Calculate’ in English. The monument which was built in the early 18th century got heavily damaged during the revolt of 1857. The Samrat Yantra, Jayaprakash Yantra and Misra Yantra are the three major instruments out of the 13 instruments located in Jantar Mantar. The purpose of Samrat Yantra was to measure time as well as to measure drift and other interconnected coordinates of certain celestial bodies. The purpose of Jayaprakash Yantra was to help an observer to position the stars in the sky with certain markings. The purpose of Misra Yantra was to conclude the longest and shortest days of the year. This important monument has also been enlisted as a UNESCO World Heritage Site. The other four similar monuments are located in different cities of north-western India which are Jaipur, Ujjain, Mathura, and Varanasi. This ancient monument was constructed out of brick, rubble and then plastered with limestone. The monument also comprises of a small temple of Bhairava.
Outstanding Universal Value
Jantar Mantar, New Delhi, is one of the five observatories built by Maharaja Jai Singh II of Jaipur in the year 1724. This time observatory was built after Mughal emperor Muhammad Shah allotted the task of re-examining the calendar and astronomical records to Maharaja Jai Singh II. This observatory completed the purpose of compiling astronomical records along with the task of estimating time and tracking the movement of celestial bodies such as moon, sun, and other planets.