Template:8 December in the history
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- 1660 – Margaret Hughes appeared professionally on the English stage; she is thought to have been the first woman to do so.
- 1854 – Pope Pius IX promulgated the apostolic constitution Ineffabilis Deus, proclaiming the dogmatic definition of the Immaculate Conception, which holds that the Virgin Mary was conceived free of original sin.
- 1941 – The Holocaust: The Chełmno extermination camp in occupied Poland, the first such Nazi camp to kill Jews, began operations.
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