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March 19, 1229: Having negotiated a treaty with Muslims for Christian access to Jerusalem, Holy Roman Emperor Frederick II (a reluctant participant in the sixth crusade) enters the Church of the Holy Sepulcher and crowns himself king. But his peace treaty was denounced by members of both faiths, and the same day the Catholic patriarch of Jerusalem pronounced an interdict on the city. Frederick was later excommunicated for making peace instead of war (see issue 40: The Crusades).

March 19, 1684: Jean ...

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