Eras

1. Prehistoric c. 3000000–3000 BCE
   Neolithic
2. Ancient c. 3000–500 BCE
   Predynastic Period Early Dynastic Period Old Kingdom First Intermediate Period Middle Kingdom Second Intermediate Period New Kingdom Third Intermediate Period Late Period Ptolemaic Period Achaemenid Qin Dynasty
3. Classical c. 800 BCE–476 CE
   Archaic Greece Classical Greece Hellenistic Period Roman Republic Late Roman Republic Roman Empire Second Temple Period Nabataean Kingdom
4. Medieval c. 476–1500 CE
   Inca Empire Khmer Empire
5. Early Modern c. 1500–1800 CE
6. Modern c. 1800–1945 CE
7. Contemporary c. 1945 CE–present