The Mehrauli Iron Pillar inscription belongs to the Gupta period, specifically dating to the reign of Chandra Gupta II (c. 375-415 CE). This remarkable 7-meter pillar, located in the Qutub complex, has not rusted despite being over 1,600 years old due to its high phosphorus content creating a protective layer. The inscription praises Chandra Gupta II and mentions his military victories, demonstrating the metallurgical excellence and Sanskrit epigraphy of the Gupta golden age.