Concept notes: Maharaja Jai Singh II, a ruler of the Kachwaha Rajput dynasty, was a keen astronomer and built several astronomical observatories, known as Jantar Mantar, across his kingdom. The most famous of these is located in Jaipur and includes a large sundial, which is a significant landmark and a testament to the scientific and architectural achievements of the period.
Explanation: Maharaja Jai Singh II, who ruled the kingdom of Amber (later Jaipur) from 1699 to 1743, was a significant figure in the history of Rajasthan. He was not only a capable ruler but also a keen astronomer and mathematician. His interest in astronomy led him to construct several observatories, known as Jantar Mantar, across his kingdom. The most famous of these is located in Jaipur and includes a large sundial, which is a significant landmark and a testament to the scientific and architectural achievements of the period.
The Jantar Mantar in Jaipur is a collection of architectural astronomical instruments, built between 1724 and 1734. The most prominent instrument is the Samrat Yantra, a large sundial that is one of the largest in the world. It is designed to measure the time of day and the declination of celestial bodies. The sundial is a remarkable example of the integration of science and architecture, reflecting the advanced understanding of astronomy in the 18th century.
Maharaja Jai Singh II was influenced by the works of ancient Indian astronomers and also by the astronomical knowledge of the Islamic world. He aimed to create observatories that would be more accurate than those in use at the time. The Jantar Mantar in Jaipur is not only a historical monument but also a functional observatory that continues to be used for astronomical observations.
The construction of the Jantar Mantar observatories was a significant contribution to the field of astronomy and demonstrated the scientific curiosity and architectural prowess of the period. The observatories are now recognized as UNESCO World Heritage Sites, highlighting their importance in the history of science and architecture.
In summary, Maharaja Jai Singh II is the correct answer because he was the ruler who commissioned the construction of the Jantar Mantar observatory in Jaipur, which includes the large sundial known as the Samrat Yantra. This observatory is a significant historical and scientific landmark that reflects the advanced understanding of astronomy and architecture in 18th-century Rajasthan.