However, the short marriage ended when Louis François's wife died giving birth to a stillborn child at the Château d'Issy in 1736.

[1] Louis François also pursued a military career and he accompanied the Duke of Belle-Isle to Bohemia when the War of the Austrian Succession broke out in 1741.

[2] In that same year, a faction of Polish nobles offered Conti the throne of Poland, where King Augustus III was expected to die soon.

Although Conti did not secure the Polish throne, he did remain in the confidence of the king until 1755, when Madame de Pompadour destroyed his influence through her intrigues at court.

His relationship with Louis XV deteriorated enough that when the Seven Years' War broke out in 1756, Conti was refused the command of the army of the Rhine.

He was exiled from court and, following involvement in a Frondiste association with Protestants and with the affairs of Parlement, Conti settled into stylish retirement as Grand Prior of the Knights of the Order of Malta, resident at the Palais du Temple in Le Marais.

His collection included Michel Barthélemy Ollivier's English Tea Served in the Salon des Glaces at the Palais du Temple, dated 1764, showing the infant Mozart at the clavichord (now in the Palace of Versailles).