English Iron pillar of Delhi Cited by user 27.97.169.58 on 10 Feb 2020 The iron pillar of Delhi is a structure 7.21 m high with a 41 cm diameter that was constructed by Chandragupta II (reigned c.
English Timeline of historic inventions Cited by user Chan-Paton factor on 31 Jan 2020 The timeline of historic inventions is a chronological list of particularly important or significant technological inventions and the people who created the inventions.