The 29th century BC was a century that lasted from the year 2900 BC to 2801 BC.
- c. 2900 BC: Beginning of the Early Dynastic Period I in Sumer.
- c. 2900 BC – 2600 BC: Votive statues from the Square Temple of Eshnunna (modern Tell Ashmar, Iraq) were made. One of them is now in the Oriental Institute of the University of Chicago. Excavated 1932–1933.
- c. 2900 BC – 2400 BC: Sumerian pictographs evolve into phonograms.
- 2900 BC – 2334 BC: Mesopotamian wars of the Early Dynastic period.
- 2900 BC-First Mariote Kingdom founded.
- 2890 BC: Egypt: Pharaoh Qa'a died. End of First Dynasty, start of Second Dynasty. Pharaoh Hotepsekhemwy started to rule.
- 2890 BC – Akkadian language names are recorded from about this time period.
- 2880 BC: Estimated germination of the Prometheus Tree, previously thought to be the world's oldest living organism until it was cut down in 1964 AD.
- 2879 BC: Hùng Vương Kinh Dương Vương established the Hồng Bàng dynasty in Vietnam (then known as Văn Lang).
- c. 2874 BC: The 365-day calendar year was installed in ancient Egypt, with fixed lunar months of 30 days + 5 epagomenal days.
- 2863 BC: Egyptian 2nd Dynasty Prince Raneb born around this year in history.
- 2860 BC: Saqqara Tomb A construction started.
- 2852 BC: The beginning of the period of the Three Sovereigns and Five Emperors in China.
- c. 2835 BC: The Balearic cave goat became extinct around this time.
- 2832 BC: Estimated germination of the oldest living tree and organism on earth as of 2020 the Methuselah Tree, the second-oldest known organism. Sprouting in what would become Inyo County, California.
- 2807 BC: Suggested date for an asteroid or comet impact occurring between Africa and Antarctica, around the time of a solar eclipse on May 10, based on an analysis of flood stories. Possibly causing the Burckle crater and Fenambosy Chevron.
- Ur becomes one of the richest cities in Sumer
- Marc Van De Mieroop, A History of the Ancient Near East ca. 3000 - 323 BC (Oxford: Blackwell Publishing, 2004), p. 39
- Pelley, Patricia M. (2002). Postcolonial Vietnam: New Histories of the National Past. Duke University Press. p. 51.
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- Turvey, Sam (2009). Holocene extinctions. Oxford University Press. pp. 20–33, 42–50, 64–94, 352. ISBN 978-0-19-953509-5. Retrieved 29 February 2012.
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- "About Iraq Editorial". iraqdirectory.com.