 Mademoiselle de Blois was an illegitimate daughter of Louis XIV and Madame de Montespan.Bouillon had previously refused to take part in the marriage of Louise-Françoise de Bourbon, Mademoiselle de Nantes (sister of Mademoiselle de Blois) to the Duke of Bourbon in 1685 and was subsequently exiled then recalled to perform the formal ceremony.The cardinal then put forth great efforts to obtain the vacant Prince-Bishopric of Liège, but could not overcome the opposition of Louvois, who secured the dignity for Clement Joseph of Bavaria.