The iron pillar is one of the world’s foremost metallurgical curiosities. The pillar, 7.21 metre high and weighing more than six tonnes, was originally erected by Chandragupta II Vikramaditya (375–414 AD) in front of a Vishnu Temple complex at Udayagiri around 402 AD, and later shifted by Aanagpal in 10th Century AD from Udaygiri to its present location. Anangpal built a Vishnu Temple here and wanted this pillar to be a part of that temple.
The estimated weight of the decorative bell of the pillar is 646 kg while the main body weighs 5865 kg thereby making the entire pillar weigh at 6,511 kg. The pillar bears an inscription in Sanskrit in Brahmi script dating 4th century AD, which indicates that the pillar was set up as a Vishnudhvaja, standard of god Vishnu, on the hill known as Vishnupada in memory of a mighty king named Chandra, believed to Chandragupta II. A deep socket on the top of this ornate capital suggests that probably an image of Garuda was fixed into it, as common in such flagpoles