> [!quote] [Wall](https://member.worldhistory.org/wall/) via World History Encyclopedia > Shulgi's son, Shu-Sin, grandson, and great-grandson all tried to maintain this wall but, as it was not anchored at either end to any terminus, proved to be ineffective (one could simply march an army around either end of the wall) and finally was breached by the Elamites c. 1750 BCE resulting in the fall of Ur and the region of Sumer. Another wall of this kind, still extant, is the Great Wall of Gorgan (known as `The Red Snake` due to the red color of the bricks) in modern-day Iran. Built by the Parthian Empire (247 BCE-224 CE) it was restored and renovated by the Sasanian Persians in the 5th or 6th century CE, the wall runs 121 miles (195 Kilometres) long and included over thirty forts along its line. The [DBQ about whether the Great Wall of China was worth it](https://coretools.ldc.org/mods/41d7a7c7-0aba-4d9b-b928-1fc3ccf5138a). Also the [Southwestern border wall in America](https://www.usatoday.com/border-wall/).