21st century BC in architecture

• Great Ziggurat of Ur constructed{{cite web |url=https://www.army.mil/article/41488/touring_the_great_ziggurat_of_ur |title=Touring the Great Ziggurat of Ur |last=Huth |first=Andrew |date=June 26, 2010 |website=Army.mil |publisher=United States Army |access-date=February 15, 2020 |quote=}}

==See also==

• 21st century BC
• Timeline of architecture

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Architecture

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