 Queen Juliana faced another crisis among her Protestant citizens in 1963, when her second daughter Irene secretly converted to Roman Catholicism and, without government approval, on 29 April 1964 married Prince Carlos Hugo of Bourbon, Duke of Parma, a claimant to the Spanish throne and also a leader in Spain's Carlist party.Given the history of the Dutch struggle for independence from Roman Catholic Spain, and with fascist German oppression still fresh in the minds of the Dutch people, the events leading to the marriage were played out in all the newspapers and a storm of hostility erupted against the monarchy for allowing it to happen—a matter so serious that the queen's abdication became a real possibility.She survived, however, thanks to the underlying devotion she had earned over the years.