Due to the illegitimate birth of the comte de Toulouse, members of the House of Bourbon-Penthièvre were not Princes and Princesses du Sang, although they held a high rank at court as members of the king's family, and lived in apartments near those of the king in Versailles.

(The title of duc de Penthièvre was revived briefly in 1820 for Charles d'Orléans (1820–1828), the fourth son of Louis-Philippe I, King of the French.)

As he inherited not only his father's fortune, but that of his cousins, the duc de Penthièvre was said to be, and probably was the wealthiest man in France.

[7] The duc du Maine's fortune was supplemented with many expensive gifts from his adoring father, the king.

Upon the death of the duc de Penthièvre in 1793, the Bourbon-Penthièvre fortune Louise Adélaïde was to inherit was confiscated by the revolutionary government.

It is only after her return to France during the First Bourbon Restoration of 1814 that she was able, through numerous legal battles, to regain what was left of some of her land estates, many of them having been either sold, gutted or nearly destroyed during the Revolution.

After her "execution", her body and head were buried separately, at different times, and probably not in the same mass grave in the Enfants-Trouvés cemetery in Paris.