The iron pillar of Delhi, India is a 7 meter high pillar in the Qutb complex which is notable for the composition of the metals used in its construction. The pillar is 98% pure wrought iron, and is a testament to the high level of skill achieved by ancient Indian ironsmiths. It has attracted the attention of both archaeologists and metallurgists, as it has withstood corrosion for over 1,600 years in the open air.
Iron pillar of Delhi
