Treaty of Vienna
During the later years of Philip V, when he was nearly senile, Elisabeth directed the whole policy of Spain so as to secure thrones in Italy for her sons. In 1731 she had the satisfaction of seeing her favored scheme realized with the recognition by the powers in the Treaty of Vienna of her son Don Carlos (afterwards Charles III of Spain) as the Duke of Parma, and after the 1738 Treaty of Vienna his accession to the throne of the Two Sicilies. Her second son, Philip, became Duke of Parma in 1748.