The Great Pyramid was the tallest human-made structure for about 3,800 years.

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It held the record until Lincoln Cathedral’s spire in England surpassed it around 1311.

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The Indian rupee symbol ₹ was adopted in 2010.<span class="aj-year">1840</span>Postage stamps were introduced in 1840.The Great Wall of China is not visible from space with the naked eye.