 The history of Amer and Jaigarh is indelibly linked to these rulers, as they founded their empire at Amer.During the reign of the Mughal Emperor Shah Jahan, Jaigarh Fort, which is located 150 miles south-west of Delhi, became one of the world's most efficient cannon foundries mainly due to the abundance of iron ore mines in the vicinity of the fort.The cannon foundry Jaigarh Fort had a massive wind tunnel that sucked air from the high mountains into its furnace creating temperatures as high as , the heated air would melt the metal.