Adaptation Displacement: Unlike Queen Margot, most people saw the adaptation of this work rather than reading the book itself.
Cliché Storm: The book was a fresh breath in Romantic literature and still has imitators among women's novels, however there is no need to say how often most of its tropes were played to our time.
Dawson Casting: For the same reasons as Queen Margot: most of the characters were much younger than you expect to see in such a work, or than the audience you are counting on.
Germans Love David Hasselhoff: Has a cult status in Russia, where this book was adapted in the form of a series together with Queen Margot in the 90's and was recognized as "one of the last good costume films shot in the Soviet tradition."
Ho Yay: First of all, because of the Values Dissonance. Secondly, when it concerns the king and the minions, it's deliberate, since Henry III and his friends were supposedly at least bisexual, according to many contemporaries and historians.
Memetic Badass: De Bussy, who masterfully defeats opponents with any number or any level of fencing, and dies only because he is eventually betrayed.
Periphery Demographic: In the original it was a female novel, but most adaptations turn it into serious work with intrigues and steep fencing, which makes this story attractive for men.
It Was His Sled: The age and popularity of the book have done their job, so most modern people know that Bussy and the minions die in the end.
Seinfeld Is Unfunny: Once it was an original tragic love story that made many girls and women cry, now it's too Cliché Storm because of the passage of time. And this is not to mention the overabundance of melodramatic Dead Horse Trope.