Italian cardinal.  served twice as Cardinal Secretary of State for the Papal States and who played a crucial role in the post-Napoleonic reassertion of the legitimist principle of the divine right of kings, of which he was a constant supporter.
 
MS - Manuscript endorsement, third person, dated 1810, the time of the Concordat between The Holy See and France. Addressed to Monsieur Cavagnari. Accompanied by a two page handwritten document in France (not translated) as well as the original auction house entry.  Ensemble is circa early 1900s. Merits further research as being potentially historically-significant.