In 1771, the Perpetual Imperial Diet approved the eventual investiture of Ferdinand with the imperial fiefs held by Ercole III. There had been an earlier treaty in 1753 making Ferdinand's older brother Peter Leopold the heir to the Duchy of Modena, but in 1761, Peter Leopold became heir to the Grand Duchy of Tuscany, which required a change to the Modena agreement. In 1763, the penultimate Este Duke of Modena, Francesco III, signed a treaty with the Empress Maria Theresa engaging the nine-year-old Ferdinand to his only son Ercole's daughter, Maria Beatrice, making him thus his heir. He was also designated as the heir to the Duchy of Modena and Reggio, but he never reigned, owing to the Napoleonic Wars.Įarly life Watercolor portrait of Ferdinand Karl by Liotard in 1762įerdinand Karl was born on 1 June 1754 at the Schönbrunn Palace in Vienna as the fourth son and fourteenth child of the Holy Roman Emperor Franz I and his wife, Maria Theresa of Austria. He was the founder of the House of Austria-Este and Governor of the Duchy of Milan between 17. German: Ferdinand Karl Anton Josef Johann Stanislaus von Österreich-EsteĪrchduke Ferdinand Karl of Austria-Este (Ferdinand Karl Anton Joseph Johann Stanislaus 1 June 1754 – 24 December 1806) was a son of Holy Roman Emperor Franz I and Maria Theresa of Austria. Maximilian, Grand Master of Teutonic KnightsĮnglish: Ferdinand Charles Anthony Joseph John Stanislas of Austria-Este.
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