Below are descriptions of this novel and the film made from it which I want to read.
From the books google listing:
"M. de Maubrun liked Paris: a royal and majestic city which, nevertheless, the Republic had used wisely. Surely the first city of the world! The marquis knew that he was chauvinistic. There was nothing he could do about it. The more the twentieth century pushed France into the row of little nations, the prouder he was to be a Frenchman. He went calmly to revisit the Louvre, Versailles, Notre-Dame, Saint-Denis -- and then he felt better. Paris in July -- bright, spacious, brilliant with leaves and blue days -- was reassuring to him. The new merchandise he saw in the large store windows seemed worthy of these old stones. In the streets he contemplated women of a beauty not to be found in any other corner of the world."
A description of the 1955 French film based on the novel:
"(From) A novel by Michel De Saint Pierre was the source for Les Aristocrates. Pierre Fresnay stars an aging (sic) Marquis, who tries his best to uphold the traditions of nobility in an ever-changing world. The Marquis’ children prefer the trappings of modern society and pop culture and regard their father as a relic. This cultural clash nearly results in tragedy when two of the Marquis’ offspring substitute recklessness for common sense."