This magnificent Iron Pillar at Qutb Minar has remained rust-free for 1,600 years: Here’s why |
Standing in the courtyard of the Qutb complex in Delhi, the Iron Pillar is one of the most extraordinary achievements of ancient Indian metallurgy. Forged during the Gupta period around the 4th or 5th century CE, the monument has stood beneath the open sky for nearly 1,600 years while showing remarkably little corrosion. Historians widely…