(Posted in response to the Weekly Photo Challenge – Numbers)
This picture captures number etched on one of the solar instruments at Jantar Mantar, a UNESCO World heritage site in Jaipur. The marking is etched on a marble stone surface. The number etched is in Hindi script reading 13. The reading on Rasivalaya Yantra is taken with help of shadow created by the Sun. There are twelve such instruments each representing the signs of zodiac and measures current latitude and longitude of the celestial body.
Between 1724 and 1727 AD, Maharajah Sawai jai Singh II, founder of Jaipur city built solar observatories in five different cities in North India. Out of all these five, the solar observatory in Jaipur is the most elaborate one. All it’s instruments are still in working condition and are quite precise. It’s being claimed that Jantar Mantar in Jaipur completed in 1734 AD. Explained simply Jantar means instrument and Mantar means calculation, so it implies instrument of calculation. Maharajah Jai Singh II was a great mathematician and had a keen interest in astronomy, which led to building of Jantar Mantar. Drawing from knowledge of Persian, Arabic and Portuguese astronomy, these were one of it’s kind solar instruments built anywhere.