In 1625, he went to Paris as special legate and from March to September, undertook various negotiations with Cardinal Richelieu including discussions in advance of the Treaty of Monçon.
Godine 1625., odlazi u Pariz kao poseban legat, a od ožujka do rujna, poduzeo je razne pregovore s kardinalom Richeliom uključujući rasprave prije Ugovora iz Monçona.