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11000 BCE: Temple walls of Gobekli Tepe built.
5400 BCE: The City of Eridu is founded.
4800 BCE: Neolithic village of Banpo in China built.
4500 BCE: First walled cities. Uruk in Mesopotamia first city.
3100 BCE: Neolithic Village of Skara Brae inhabited, stone walls built.
2500 BCE: Village of Skara Brae is abandoned for unknown reasons.
2038 BCE: King Shulgi of Ur builds his great wall in Sumer.
1792 BCE: King Hammurabi builds walls of Babylon.
1180 BCE - 1178 BCE: Ramesses III of the 20th Dynasty fortifies Xois against the threat of the invading Sea Peoples.
575 BCE: Nebuchadnezzar II builds the Ishtar Gate and great walls of Babylon.
247 BCE - 224 CE: The Parthian Empire builds The Great Wall of Gorgan.
220 BCE - 210 BCE: Emperor Shi Huangti initiates building the Great Wall of China and the Grand Canal.
218 BCE: Construction of the Great Wall of China is initiated.
194 BCE: The great walls of the city of Xi'an built.
122 CE: Construction begins on Hadrian's Wall.
142 CE: The Antonine Wall built under Antoninus Pius, north of Hadrian's Wall.
265 CE: Gallienus builds walls around Verona.
410 CE: Rome withdraws forces from Britain.
410 CE - 413 CE: The Theodosian Walls are built to better protect Constantinople.
469 CE: The Byzantine Empire builds the Anastasian Wall.
628 CE: The Goguryeo kingdom of northern Korea builds a 480-km defensive wall as protection against attack from China.