Débat sur le Roman de la Rose
or
Les Epistres sur le Roman de la Rose
The first title is the uniform title of the manuscript— this is how libraries and archives had catalogued this piece. In fact, this was a title supplied by the cataloguer and it does not appear anywhere in the text. However, the title handwritten on the first page is Les Epistres sur le Roman de la Rose (or in English, The Letters concerning Roman de la Rose). This second title makes more sense since the text itself is but a compilation of letters written by Christine de Pizan to other noblemen and women critiquing the misogynist view-point of Roman de la Rose.
