On This Day

What Happened in 421 AD

Historical Events

  • Feb 8 Flavius Constantine becomes Co-Emperor as Emperor Constantius III of the Western Roman Empire with Honorius
  • Mar 25 Friday at 12 PM - city of Venice founded

Famous Weddings

  • Jun 7 Aelia Eudocia Athenais of Athens marries Eastern Roman Emperor Theodosius II

Famous People Who Died in 421 AD

  • Sep 2 Flavius Constantine III, Emperor of Western Roman Empire, dies at about 51