 The "Jaivana" was, at the time of its manufacture in 1720, the world's largest cannon on wheels of the Early Modern Era.The Jaivana was manufactured during the reign of Maharaja Sawai Jai Singh II (1699–1743) at a foundry in Jaigarh.This cannon was never used in any battle as the Rajput rulers of Amer had friendly relations with the Mughals.