The Treaty of Florence was signed, which ended the war between the French Republic and the Kingdom of Naples.
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The Vienna Philharmonic Orchestra performed its first concert.
A nuclear disaster occurred at Three Mile Island in Pennsylvania, US.
The UK issued a new 12-sided £1 coin into circulation.
Frenchman Henri Fabre flew the world's first seaplane in Martinique, France.
Stanley Kramer became the first person to receive a star on the Hollywood Walk of Fame.
