From England he passed to the Low Countries, Germany, Switzerland and Italy, and on his return to the Peninsula in 1796 was appointed official translator to the foreign office.
Depretis then succeeded in recomposing the Cairoli cabinet without Cairoli, Mancini being placed at the foreign office.
They hastened Mancinis downfall (17th June 1885), and prepared the advent of count di Robilant, who three months later succeeded Mancini at the Italian Foreign Office.
Upon the fall of the Saracco cabinet (9th February 1901) Visconti Venosta was succeeded at the foreign office by Signor Prinetti, a Lombard manufacturer of strong temperament, but without previous diplomatic experience.
He also spent some time in the Foreign Office in Berlin.