Conversation so far:
When did Charles Baudelaire die ?
Charles Baudelaire died on 31 August 1867
Where is Charles Baudelaire buried ?
Charles Baudelaire is buried in the Cimetière du Montparnasse, Paris
Did Charles Baudelaire write any poems or books in his final years ?
Charles Baudelaire worked on a translation and adaptation of Thomas De Quincey's Confessions of an English Opium Eater. Other works in the years that followed included Petits Poèmes en prose
Can you name one of those books by charles baudelaire  published posthumously ?
Le Spleen de Paris, also known as Paris Spleen or Petits Poèmes en prose, is a collection of 50 short prose poems by Charles Baudelaire.
What is Un Dernier Chapitre de l'histoire des oeuvres de Balzac by charles Baudelaire about?
How did Charles Baudelaire die ?
Charles Baudelaire suffered a massive stroke in 1866 and paralysis followed

Question: What illness has caused this Paralysis ?
Self-contained rewrite: What illness has caused Charles Baudelaire's Paralysis ?