Louis Jean Marie de Bourbon (16 November 1725 – 4 March 1793) was the son of Louis Alexandre de Bourbon and his wife Marie Victoire de Noailles. He was also a grandson of Louis XIV of France and his mistress, Madame de Montespan. From birth he was known as the Duke of Penthièvre. He also possessed many titles inherited from his father and was the richest man in France during his lifetime. He was later the father in law of Philippe Égalité. Though his fsther was an illegitimate son of a king the young duke was still known as and given the rank of a Prince of the blood. A majority of his vast fortune had been inherited via "La Grande Mademoiselle". Hen was also famous for his incredible generosity to the poor of the time. He also owned the land where the future Royal Chapel of Dreux would be built.