 In the Castilian "Cortes" of Valladolid in 1506 and of Madrid in 1510, Charles was sworn as the Prince of Asturias, heir-apparent to his mother the Queen Joanna.On the other hand, in 1502, the Aragonese "Corts" gathered in Saragossa and pledged an oath to Joanna as heiress-presumptive, but the Archbishop of Saragossa expressed firmly that this oath could not establish jurisprudence, that is to say, modify the right of the succession, except by virtue of a formal agreement between the "Cortes" and the King.So, upon the death of King Ferdinand II of Aragon, on 23 January 1516, Joanna inherited the Crown of Aragon, which consisted of Aragon, Catalonia, Valencia, Naples, Sicily and Sardinia, while Charles became governor general.