Muhammad al-Idrisi
The world's first iron pillar was the [[Iron pillar of Delhi]]—erected at the times of [[Chandragupta II]] Vikramaditya (375–413). The swords manufactured in Indian workshops find written mention in the works of [[Muhammad al-Idrisi]] (flourished 1154). Indian Blades made of [[Damascus steel]] found their way into [[Persia]]. European scholars—during the 14th century—studied Indian casting and metallurgy technology.