Amadeus, 1845-90, king of Spain (1870-73), duke of Aosta, son of Victor Emmanuel II of Italy. After the expulsion (1868) of Queen Isabella II, Juan Prim urged the Cortes to elect Amadeus as king. He accepted the crown reluctantly. Just before the new king arrived in Spain, Prim was assassinated. The upper classes were opposed to Amadeus, who belonged to the anticlerical house of Savoy, and he was unable to gain significant support in any segment of society; repeated attempts were made on his life. When a new rebellion by the Carlists began, Amadeus abdicated and returned to Italy. A year later Alfonso XII was proclaimed king.