Visitors to the courtyard of the complex’s Quwwat-ul-Islam Mosque will immediately spot an imposing 7.2-meter, six-ton iron pillar with a decorative top that’s even older than the complex.

An iron pillar placed in the UNESCO-listed Qutub Minar complex in New Delhi has long fascinated scientists for surviving over 1,600 years without rust. Standing tall at 7.2 metres and weighing six ...

In the middle of Delhi, not far from the iconic Qutub Minar, stands an ancient iron pillar that has puzzled scientists and historians for over 1,600 years. Despite facing harsh weather ...