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In page Isabella of Portugal:

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Isabella was educated under the supervision of her governess Elvira de Mendoza. Her studies included mathematics, Renaissance classics, the languages of Latin, Spanish and French besides her native Portuguese, etiquette, and Christian doctrine. Isabella and her siblings were punished by their mother, "when they deserved it, without pardoning any of them".[citation needed] At the age of 14, her mother died. She and her sister Beatrice inherited her properties, plus the income from Viseu and Torres Vedras.