[1] Pourtalès freed the Bérochaux from cartage chores in 1822 and, in recognition, received a bench with his coat of arms at the church.

At his mansion, Pourtalès assembled one of the most important collections of antiques and paintings of his time, including the Laughing Cavalier by Frans Hals and works by Bronzino, Rembrandt, Jean-Auguste-Dominique Ingres and a Sandro Botticelli portrait.

[1] In 1806, he purchased the Château de Bandeville in Saint-Cyr-sous-Dourdan where, in 1833, he had the English-style park redeveloped by landscape designer Louis-Sulpice Varé, in one of the first known works.

The estate passed to his eldest daughter and her husband, the Marquis de Ganay, and their family.

His wife's sister, Eliza Augusta, married the American archeologist and artist John Izard Middleton.

[17] Through his son Henri, he was a grandfather of Count Arthur de Pourtalès (1844–1928), a diplomat who twice married Americans.