Holy Emperor Louis IV of Bavaria defeated Frederick I of Austria during the Battle of Gammelsdorf.
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The Berlin Wall began to fall.
The Stockholm Bloodbath came to an end when the final executions took place.
Piero the Unfortunate was stripped of his title of Lord of Florence, Italy, and exiled.
George Bruce received the first US design patents for typefaces and bordering.
Facebook's parent company, Meta, laid off 11,000 employees amid a weak advertising market.
