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816 - Saint Leo III ends his reign as Catholic Pope.

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1366 - Children at Touvres, France, discover a hoard of about 4 million coins.

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1519 - Birth of Cosmos de Medici art patron (Accademia del Disegno).

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1665 - England installs a municipal government in New York City (the former Dutch settlement of New Amsterdam).

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1667 - First blood transfusion to a human, nine ounces of blood from a lamb to a 15-year-old boy in France.

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1701 - Act of Settlement gives English crown to Sophia, Princess of Hanover.

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1771 - Birth of Patrick Gass Falling Springs Pennsylvania, sergeant of Lewis and Clark Expedition.

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1775 - First naval battle of Revolution-Unity (Am) captures Margaretta (Br).

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1776 - Virginia adopts Declaration of Rights.

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1787 - Law passes providing a senator must be at least 30 years old.

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