Otto IV was crowned Emperor of the Holy Roman Empire by Pope Innocent III.
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Native American Kateri Tekakwitha became the first native to become a saint.
Pope Francis succeeds Pope Benedict XVI.
The first Vatican Council, also known as Vatican I, decrees the doctrine of Papal infallibility.
A wooden relic thought to be from Jesus's manger was returned to Bethlehem.
An assassination attempt was made on Pope John Paul II.
