history timeline By merily_006 9999 BCE Paleolithic 9999 BCE Neolithic 9999 BCE Metal age Period: 9999 BCE to 3500 BCE Prehistory 3500 BCE Invent of Writing Period: 3500 BCE to 476 BCE Old Age 476 End of the occidental Roman empire Period: 476 to 1492 Middle age 1492 The discovery of America Period: 1492 to 1578 Modern age Period: 1578 to 2020 Contenporany age