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Centuries: 4th century - 5th century - 6th century Decades: 370s 380s 390s 400s 410s - 420s - 430s 440s 450s 460s 470s Years: 420 421 422 423 424 - 425 - 426 427 428 429 430 Events October 23 -Valentinian III becomes western Roman emperor Last known usage of Demotic Births Deaths October 10 - Atticus[?], Patriarch of Constantinople Joannes, usurper in the western Roman Empire.
Centuries: 4th century - 5th century - 6th century
Decades: 370s 380s 390s 400s 410s - 420s - 430s 440s 450s 460s 470s
Years: 420 421 422 423 424 - 425 - 426 427 428 429 430
Births
Deaths