The Iron Pillar of Delhi is a 22 feet high pillar located in the Qutb complex in India. The pillar, made from wrought iron, has been astounding scientists by its ability to resist corrosion after all these years.
Chandragupta II Vikramaditya (c 380 to 413/415 CE): He was one of the most powerful kings of the Gupta Empire who ruled the northern India for a long time. He was the son of Samudragupta the Great. The period of his rule is referred to as the Golden Age of India in the history books. Chandragupta II Vikramaditya ruled fearlessly for a very long time and went on to aggressively expand his empire like his predecessor did.