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Mistress Melusine von der Schulenburg, a German noblewoman, was the mistress of King George I of Great Britain. She was born in 1667 into a prominent Prussian family and gained prominence as the king's official mistress and confidante after the death of his wife, Queen Sophia Dorothea. Melusine's influence and status in the British court were significant, shaping many political matters during George I's reign.