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  2. Great Wall of China - Wikipedia

    en.wikipedia.org/wiki/Great_Wall_of_China

    The Great Wall of China cannot be seen by the naked human eye from the Moon. [71] Even though the myth is thoroughly debunked, it is still ingrained in popular culture. [72] [73] The apparent width of the Great Wall as seen from the Moon would be the same as that of a human hair viewed from 3 km (2 mi) away. [74]

  3. Ming Great Wall - Wikipedia

    en.wikipedia.org/wiki/Ming_Great_Wall

    The Great Wall at Dajingmen, part of the Xuanfu stretch of the Great Wall. The gate structure is a Qing dynasty construction. The gate structure is a Qing dynasty construction. With the Ordos now adequately fortified, the Mongols avoided its walls by riding east to invade Datong and Xuanfu , which were two major garrisons guarding the corridor ...

  4. History of the Great Wall of China - Wikipedia

    en.wikipedia.org/wiki/History_of_the_Great_Wall...

    Course of the Wall throughout history. The history of the Great Wall of China began when fortifications built by various states during the Spring and Autumn (771–476 BC) [1] and Warring States periods (475–221 BC) were connected by the first emperor of China, Qin Shi Huang, to protect his newly founded Qin dynasty (221–206 BC) against incursions by nomads from Inner Asia.

  5. Gates of Alexander - Wikipedia

    en.wikipedia.org/wiki/Gates_of_Alexander

    The Gates of Alexander may represent an attempt by Westerners to explain stories from China of a great king building a great wall. [ citation needed ] Knowledge of Chinese innovations such as the compass and south-pointing chariot is known to have been diffused (and confused) across Eurasian trade routes.

  6. List of walls - Wikipedia

    en.wikipedia.org/wiki/List_of_walls

    Part of the southern section of the Chester city walls showing the base of a former drum tower and the River Dee The Roman walls of Lugo are a UNESCO World Heritage Site The Walls of Ston are a series of defensive stone walls, originally more than 7 kilometres (4.3 mi) long, that surrounded and protected the city of Ston, in Dalmatia, part of the Republic of Ragusa, in what is now southern ...

  7. Hercules–Corona Borealis Great Wall - Wikipedia

    en.wikipedia.org/wiki/Hercules–Corona_Borealis...

    The Hercules–Corona Borealis Great Wall (HCB) [1] [5] or simply the Great Wall [6] is a galaxy filament that is the largest known structure in the observable universe, measuring approximately 10 billion light-years in length (the observable universe is about 93 billion light-years in diameter).

  8. Why is it called Black Friday? Here's the real history behind ...

    www.aol.com/news/why-called-black-friday-heres...

    That day — widely credited to the faulty investments of two infamous Wall Street financiers, Jay Gould and Jim Fisk — saw the market plummet 20 percent in a single day.

  9. Defensive wall - Wikipedia

    en.wikipedia.org/wiki/Defensive_wall

    Urban areas outside the city walls, so-called Vorstädte, were often enclosed by their own set of walls and integrated into the defense of the city. These areas were often inhabited by the poorer population and held the "noxious trades". In many cities, a new wall was built once the city had grown outside of the old wall.