Gouvernement Princier de Monaco
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La Milleraye (duchy of)

Like many other fiefdoms held by the Grimaldi family of Monaco, the Duchy of La Milleraye was established through the marriage of Honoré Charles Anne Maurice, later known as Honoré IV, to Louise Félicité Victoire d’Aumont on 5 July 1777.

Louise d’Aumont was heiress, via her maternal grandmother, Charlotte-Antoinette de La Porte Mazarin, to the ducal title and assets bequeathed by Cardinal Mazarin to Armand-Charles de La Porte, husband of Hortense Mancini, niece of the Cardinal.

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