About Jantar Mantar
A celestial observatory frozen in stone
Built by a Scholar-King
Constructed 1728–1734 by Maharaja Sawai Jai Singh II, founder of Jaipur.
UNESCO World Heritage
Inscribed in 2010 as the most significant historic observatory of India.
19 Instruments
Precise stone and marble devices for measuring time, eclipses, and stars.
Samrat Yantra Shadow Simulator
See how the world's largest sundial works – based on Jaipur's solar time
Local apparent solar time (Jaipur longitude ~75.8°E)
Shadow moves ~1mm/sec on the real Samrat Yantra
Astronomical Instruments
Samrat Yantra
27.4m giant sundial, ±2 sec accuracy.
Jai Prakash
Hemispherical sky mapper.
Rama Yantra
Altitude & azimuth measurement.
Chakra Yantra
Global sun position.
Raj Yantra
Celestial lat/long astrolabe.
Digamsa
Azimuth, sunrise/sunset times.
Nadivalaya
Equatorial sundial.
Kranti Yantra
Declination measurer.
The Visionary
Jai Singh II
Mathematician, astronomer, and town planner who founded Jaipur.
Fusion of Knowledge
Blended Islamic, European, and Hindu astronomy.
Five Observatories
Delhi, Jaipur, Ujjain, Mathura, Varanasi.
Plan Your Visit
| 📍 Location | Gangori Bazaar, Pink City, Jaipur |
|---|---|
| 🕘 Timings | 9:00 AM – 4:30 PM daily |
| 🎫 Indians | ₹50 (₹25 students) |
| 🎫 Foreigners | ₹200 |
| ☀️ Best Time | Oct–Mar, morning hours |
💡 Pro Tip: Hire a guide to unlock the scientific genius behind each structure.