Major Events
- Jun 10 A landslide dam on the Dadu River caused by earthquake ten days earlier collapses, killing 100,000 in the Sichuan province of China
- Aug 8 US Congress unanimously chooses the dollar as the monetary unit for the United States of America
- Nov 30 Grand Duke of Tuscany Leopold II promulgates a penal reform, making his the 1st state to abolish the death penalty. November 30 commemorated as Cities for Life Day.
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1786 in Music
- May 1 Wolfgang Amadeus Mozart's opera "Marriage of Figaro" premieres in Vienna with Mozart himself directing
- Nov 7 The oldest musical organization in the United States is founded in Boston, Massachusetts as the Stoughton Musical Society
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