This can be seen true in Oscar's fate as she suffers from Tuborculosis and coughing up blood as she reaches what should have been the peak of her beauty and career. The problem with this interpertation is that Marie Antoinette and Fersen do not actually "wither" and thus lack parallelism.
Marie Antoinette has to learn this lesson the hard way. She has to deal with gossips about her inability to produce heirs as well as enter petty silent wars with the king's mistress. In addition, the author wants us to feel vycariously her loneliness and misery while she longs for someone to emphatize with her. When she finally finds someone she loves, she realizes that she can never be with him because she is married. However, from the outside, it appears as though she is completely happy because of all the luxuries around her and her ability to whip her husband.
To Oscar, this was the harsh reality of her life. Although she gets promoted endlessly and is always in the queen's grace, she has many reasons to be miserable. To an onlooker, it seems that she escapes the fate of normal women at that time, which is to get married and get into affairs. She is not bound to a house or children. However, because nobody trusts women, she has to work extra hard to act strong and controlled. The decision that mark the major courses of her life is never for herself. Her service to the royal family is to mainly please her father; her revolt against the royal family is mainly for the commoners.
We have names like "King of Fighters" and "Goddess of the Sun" and "The Golden Arch" standing for the real names of the signified. So "Rose of Versailles" could just be a name for somebody in the series. However, there is no pural in Japanese. So, the title could also be "Roses of Versailles". In other words, it could refer to only Oscar or it could refer to Oscar, Marie Antoinette and Fersen as the Roses of Versailles. The problem with the latter is that Fersen is not linked directly to Versailles.
Now, I am quite sure that everybody recall the famous scenes where Antoinette got into a no-speak-fight with Mme. DuBarrie.
Antoinette's position is that Mme. DuBarrie sold her body to climb the ladder of society and corrupts the French Court. DuBarrie was just insulted that a mere child would not speak with her. Well, you have to admit, those scenes, more like volumes, were pretty silly. But since I am silly too, we will look into this matter deeper. Ooohhh!
Ok, maybe sleeping your way up the royal ladder is not the most noble thing to do but one has to consider that DuBarrie probably came from a pretty poor family. Pre-revolution commoners were basically going through hell everyday. Now, she has the choice of living through hell or sleeping her way up there and getting, not only herself but her children also, out of hell. Just because she was not born with wealth does not mean that she can't strive for it.
Antoinette's treatment towards DuBarrie is not only unfair, but hypocritical. Antoinette herself is a prositude; her marriage ensures the safety of Germany and all the French riches she can get. She did not marry Louis XIV because she loves him; so, she sleeps with him like a prositude does except, in her case, it is legalized and honoured.
Also, in Berusaiyu no Bara, we never see Dubarrie commit adultery, but we do see Marie Antoinette doing that. The only reason the audience is supposed to hate Dubarrie is because she has an evil look on her face an Marie Antoinette hates her.