What Happened in 1173
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- Feb 21 Pope Alexander III canonizes Thomas Becket, Archbishop of Canterbury
- Aug 9 Construction of the Tower of Pisa begins, and it takes two centuries to complete
- Dec 23 Louis I, Duke of Bavaria (d. 1231)
- Aug 9 Najm ad-Din Ayyub, Kurdish soldier and father of Saladin (1st Sultan of Egypt and Syria), dies after a horse riding accident
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List of Years
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V