 Eventually, in 1814 the kingdom was restored and enlarged with the addition of the former Republic of Genoa by the Congress of Vienna.In the meantime, nationalist figures such as Giuseppe Mazzini were influencing popular opinion.Mazzini believed that Italian unification could only be achieved through a popular uprising, but after the failure of the 1848 revolutions, the Italian nationalists began to look to the Kingdom of Sardinia and its prime minister Count Cavour as leaders of the unification movement.