Question

When was iron pillar at mehrauli made?

Answer 1

Hint:1. Mehrauli is a neighbourhood situated in South Delhi, India's Delhi district. It serves a constituency in Delhi's legislative assembly. Near Gurgaon and next to Vasant Kunj, the region is situated. The new MLA from Mehrauli is Naresh Yadav of the Aam Aadmi party.
2. Because of its high resistance to corrosion, the pillar has drawn the attention of archaeologists and materials scientists and has been named a "testimony to the high level of skill "

Complete answer:
1) This king was known as Emperor Chandragupta II of the Gupta dynasty (c. 375 - 413/14 CE). While being made of 99 percent iron, the Pillar is famous for its non-rusted condition and was founded in the 5th century CE, and therefore has a life of around 1600 years.
2) The emblem of the mythical bird Garuda, the symbol of the Guptas, is believed to have stood at the top, but is now missing. The fluted capital of the bell is a hallmark of Gupta architecture. The pillar's overall length is 7.2 metres, of which 93 cm is located beneath.
3) The pillar is thought to have been brought in the late ancient or early mediaeval era by a king of Delhi from somewhere else.

Note:1 Mehrauli Park is most notable for being the only place with 1,000 daily years of occupation in Delhi. The park is home to the worn-out tombs of many important historical figures, including Balban, Quli Khan, and Sufi poet Jamali, retaining one of Delhi's highest cultural distinctions.
2 Galvanizing is a preventive tool for rust. By hot-dip galvanising or electroplating, this is done. A thin layer of zinc coates the iron or steel object. This prevents oxygen and water from accessing the metal below but zinc still serves as a sacrificial metal, which is why the pillar has not rusted.