21 September in history

The usual rules apply.
1521 The mad monk published a New Testament, i.e., Martin Luther.
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1792 Revolutionary France abolished its monarchy. Failed. Kings returned, twice over.
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1893 Frank Duryea drove a gas-powered vehicle with an internal combustion engine. So do we still.
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1937 ‘The Hobbitt’ was published, and it is still in print.
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1949 Mao declared the People’s Republic of China to exist in a performative utterance.
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