31st century BC

The 31st century BC was a century that lasted from the year 3100 BC to 3001 BC.

Spiral design altar block from the Tarxien Temples of Malta , uncovered by Sir Themistocles Zammit
Front and back sides of Narmer Palette , this facsimile on display at the Royal Ontario Museum , in Toronto , Ontario, Canada. The palette depicts Narmer unifying Upper Egypt and Lower Egypt .