See also: 30th century BC in architecture, other events of the 29th century BC, 28th century BC in architecture and the architecture timeline.

Buildings

• Dholavira, a metropolitan city of the Indus Valley Civilization located on Khadir island in the Kachchh District of Gujarat, India. The site was occupied from about 2900 2100 BCE
• Teppe Sialk - claimed to be the world's oldest ziggurat, in the city of Kashan, in central Iran.