21st century BC in architecture
Appearance
See also: 20th century BC in architecture, other events of the 21st century BC, 22nd century BC in architecture and the architecture timeline.
Buildings and structures
Buildings
- Great Ziggurat of Ur constructed[1]
References
- ^ Huth, Andrew (June 26, 2010). "Touring the Great Ziggurat of Ur". Army.mil. United States Army. Retrieved February 15, 2020.