Overview

The Iron Pillar is inscribed with a Sanskrit inscription that says that it was built as a pole for a temple in the 4th century. But that's just about all that is known about this structure. The most fascinating thing about this pillar is that it has remained rust-free for over 2000 years. Another insolvable mystery is that the kind of iron used to make this pillar can only be produced in small quantities through electrolysis, today. How it was made so many centuries ago defies explanation.