A street in Paris near the Avenue des Champs Élysées is named for the duc de Penthièvre. At the site of n° 11 rue de Penthièvre, an "hôtel particulier" of the First French Empire period with a large garden, is believed to have once been the residence of the duc de Penthièvre's grandson, the future King of the French, Louis-Philippe, in his youth. In the late 19th century, n° 11 housed the American Embassy. This address became famous in the early 20th century as the "salon de couture" of the British designer, "Lucile".