The queen of Castile, Joanna of Castile, married this member of the house of Habsburg who was the son of which monarch?
Joanna of Castile: Joanna (6 November 1479 – 12 April 1555), called the Mad (Spanish: "Juana la Loca" ), was queen of Castile from 1504 and of Aragon from 1516. Joanna of Castile:  Joanna married Philip the Handsome on 20 October 1496. Philip I of Castile:  The son of Holy Roman Emperor Maximilian I, at the age of three Philip inherited the greater part of the Duchy of Burgundy and the Burgundian Netherlands (as Philip IV) from his mother, Mary, and at 27 briefly succeeded to the Crown of Castile as the husband of Queen Joanna, who was also heir presumptive to the Crown of Aragon.
i don't know