27th century BC(28th century BC - 27th century BC - 26th century BC - other centuries)
- 2900 - 2334 BC -- Mesopotamian wars of the Early Dynastic period
- 2775 - 2650 BC -- Second Dynasty wars in Egypt
- 2686 BC -- Egypt: End of Second Dynasty, start of Third Dynasty
- 2630 BC - 2611 BC - Reign of Djoser, Pharaoh of Egypt.
- 2630 - 2611 BC - Imhotep, Vizier of Egypt constructs the Pyramid of Djoser
- 2613 BC -- Egypt: End of Third Dynasty, start of Fourth Dynasty
- 2600 BC - End of the Early Dynastic II Period and the beginning of the Early Dynastic IIIa Period in Mesopotamia