Did you know? Height of the Gateway Arch in St Louis (192 m) is 2 x Height of the Elizabeth Tower (home to Big Ben) in London (96 m)
Initial height of the world's first skyscraper ? the Home Insurance Building (42 m)
/fact/initial-height-of-the-worlds-first-skyscraper-the-home-insurance-building
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If this was a standard unit ...