A system of stone-lined spring wells, tanks and channels for drinking water and irrigation was built at Gio An in Quảng Trị and is still in use.
Construction
Construction of the Gio An wells
- 9th century – 9th century CE
- Southeast Asia
Meanwhile, elsewhere
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- 9th century – 10th century CEHungarian conquest of the Carpathian BasinEurope
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- 8th century – 12th century CEChristianization of ScandinaviaEurope
- 10th century – 1999 CEfoot bindingEast Asia
- August 843 CETreaty of VerdunEurope