History

What are your favorite "long century" dividers?

(see: https://en.wikipedia.org/wiki/Long_nineteenth_century )

Mine so far:

1643-48: Ming -> Qing transition, end of 30y war (treaty of Westphalia), Galileo dies and Newton born
1789: French revolution, dawn of formalized chemistry (Lavoisier)
1911-17: Xinhai revolution, WW1, Russian revolution, theories of relativity
2020-23: COVID, end of pax americana, AI passing Turing test

499-479 BCE: Greco Persian Wars reshape the old world, Greek city states unite then dominate, democracy emerges in Athens, Hellenistic era begins.
476-529 CE: Western Roman Empire falls, Justinian reconquers much of it, Benedict establishes monastic rules, classical antiquity dies, medieval Europe is born.
1979-1989: Iranian Revolution, Soviet collapse begins, Berlin Wall falls, China goes capitalist, Cold War order crumbles, religious fundamentalism resurges.