And it refuses to rust. The origin of the remarkable Iron Pillar, part of the world-heritage-listed Qutub funerary complex in India’s Delhi, is lost to time. All sorts of ideas have been put ...

In the heart of New Delhi’s UNESCO-listed Qutub Minar ... an imposing iron pillar rises tall. At 7.2 metres and weighing six tons, this structure predates even the complex it resides in.

Researchers found the pillar’s iron contains an unusually high 1% phosphorus—far above modern industrial norms. That trace element gave birth to a microscopic shield scientists call ...

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 in Qutub Minar complex has stood tall for over 1,600 years. It is 7.2 meters tall and weighs six tonnes, predating the complex. The pillar features inscriptions honoring ...