(27th century BC - 26th century BC - 25th century BC - other centuries)
(4th millennium BC - 3rd millennium BC - 2nd millennium BC)
- 2900 - 2334 BC – Mesopotamian wars of the Early Dynastic period.
- 2500 BC – The legendary line of Sanhuangwudi rulers of China is founded by Huang Di(approximate date).
- 2575 BC – A foot defined as 26.45 cm by Sumerian ruler Gudea of Lagash.
- Rock drawings at Rødøy in Norway show the use of skis.
- 2570 BC – Estimated date of completion of the Great Pyramid of Giza.