“Bardai describes the Iron Pillar in Raso as a nail holding the ... built in the early 13th century in the city’s southern Mehrauli district – one mysterious structure stands as a testament ...

Made of iron, the Iron Pillar at Mehrauli has not rusted for over 1,600 years despite exposure to the elements, showcasing India’s advanced metallurgy techniques. In 2003, IIT-Kanpur scholars ...