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In page Maria Teresa of Savoy:

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On 17 December 1847, the Empress Marie Louise died, and, in accordance with the Congress of Vienna, Charles exchanged the duchy of Lucca for that of Parma, becoming Duke Charles II of Parma; Maria Teresa became Duchess of Parma but only for few months. The revolution broke out in March 1848. In March 1849 Charles abdicated as duke of Parma and was succeeded by their son, Charles III.[citation needed]