What Happened in 799 AD
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- Nov 29 Pope Leo III, aided by Charles the Great, returns to Rome
- Apr 13 Paul the Deacon [Paulus Diaconus Warnefred], Italian Benedictine monk and chronicler of the Lombards, dies at 70
- Sep 4 Musa al-Kazim, Shia Imam, dies at 53
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List of Years
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V