ancient agewriting is created
and very important empires such as the Roman or Egyptian empire appear in 476 AD the ancient age ends at the end of the western Roman Empire.
middle ageAt this time appeared feudalism, Islam, the Byzantine Empire, the Carolingians ... in 1453 BC the middle ages ended by the end of the Byzantine Empire
modern agein this age cristobal colon discovered america this age 1789
contemporary ageit's the current era