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Maria Teresa Felicitas d'Este Biography »
Maria Teresa Felicitas d'Este (6 October 1726 – 30 April 1754) was born a Princess of Modena and was by marriage the Duchess of Penthièvre. She was the mother-in-law of Philippe Égalité and thus the grandmother to the future Louis Philippe I of the French. Her present descendants include Juan Carlos I of Spain, Albert II of Belgium and Henri, Grand Duke of Luxembourg.