Immediately south of the City Palace lies the remarkable Jantar Mantar, a large grassy enclosure containing eighteen huge stone astronomical measuring devices constructed between 1728 and 1734 at the behest of Jai Singh, who invented many of them himself. Their strange, abstract shapes lend the whole place the look of a weird futuristic sculpture park. The Jantar Mantar is one of five identically named observatories created by the star-crazed Jai Singh across north India, including the well-known example in Delhi (see p.85), though his motivation was astrological rather than astronomical.

It’s a very good idea to pay for the services of a guide to explain the workings of the observatory, which was able to identify the position and movement of stars and planets, tell the time and even predict the intensity of the monsoon. Probably the most impressive of the observatory’s constructions is the 27m-high sundial, the Samrat Yantra, which can calculate the time to within two seconds. A more original device, the Jaiprakash Yantra, consists of two hemispheres laid in the ground, each composed of six curving marble slabs with a suspended ring in the centre, whose shadow marks the day, time and zodiac symbol – vital for calculating auspicious days for marriage.

Travel offers; book through Rough Guides

India features

The latest articles, galleries, quizzes and videos.

Indian trains: a traveller's survival guide

Indian trains: a traveller's survival guide

The Himalayan Queen, the Grand Trunk Express, the Deccan Odyssey… the very names of India’s trains are evocative of timeless style and old-school adventure…

09 Feb 2017 • Freya Godfrey insert_drive_file Article
26 awe-inspiring architectural wonders

26 awe-inspiring architectural wonders

From ancient temples to hyper-modern skyscrapers, these are just a few of the world's most incredible architectural wonders. Whether you're looking to wander l…

01 Feb 2017 • Rough Guides Editors camera_alt Gallery
Quiz: can you name these famous places in India?

Quiz: can you name these famous places in India?

India is an addictive destination. Go once and something will draw you back time and again. Perhaps it's the food, maybe it's the people, or it could well be th…

24 Jan 2017 • Rough Guides Editors help Quiz
View more featureschevron_right

Join over 60,000 subscribers and get travel tips, competitions and more every month

Join over 60,000 subscribers and get travel tips, competitions and more every month