Jahan Kosha Cannon is the historical place in Murshidabad, West Bengal, India. Topekhana was the Nawab's Artillery Park and the passage door of the old capital of Bengal, Bihar and Orissa, the city of Jahangir Nagar. It is ensured on the east by the Gobra Nala, privately known as the Katra Jheel. Here, the Jahan Kosha Cannon is let go. Before being set at its present area, it laid on a carriage with haggles encompassed by the underlying foundations of a Peepal tree.The development of the tree roots steadily lifted the firearm four feet over the ground. The wheels of the weapon carriage have vanished, yet the iron-work of the carriage and the trunions are as yet noticeable. The gun is made of ashtadhatu or 8 metals, to be specific silver, gold, lead, copper, zinc, tin, iron and mercury.