Marie Duplessis [SEP] cause of death
Marie Duplessis died of tuberculosis at the age of 23 on 3 February 1847. Her husband, the comte de Perregaux, and her former lover, the Baltic-German count Gustav Ernst von Stackelberg, were by her side. Within a few weeks of her death, her belongings were auctioned off to pay her debts.
Her funeral in Montmartre Cemetery in Paris was attended by hundreds of people.
Novel, play, and opera.
Dumas' romantic novel "La Dame aux Camélias" was based on Duplessis
quarrelled with Maupeou and with the young queen, Marie Antoinette, who demanded his dismissal from the ministry (1774).
Legacy.
He died, forgotten, in 1788. The announcement of his death was worded as follows in "Annonces Affiches Avis Bibliothèque nationale Arsenal 8 H 26195 n° 64 septembre-décembre 1788": 
4 septembre 1788 (probably date of the burial, other sources mention a date of death of 1 September) Emmanuel-Armand Duplessis-Richelieu, duc d'Aiguillon, pair de France,