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. From the union of these two crowns modern Spain evolved. Joanna married Philip the Handsome on 20 October 1496. Philip was crowned King of Castile in 1506, initiating the rule of the Habsburgs in Spain. After Philip's death that same year, Joanna was deemed mentally ill and was confined to a nunnery for the rest of her life. Though she remained the legal queen of Castile throughout this time, her father, Ferdinand II of Aragon, was regent until his death, when she inherited his kingdom as well. From 1516, her son, Charles I, ruled as king, while she nominally remained co-monarch.
Archduke Joseph, Palatine of Hungary Joseph Anton Johann, Archduke of Austria (German: "Erzherzog Joseph Anton Johann Baptist von Österreich-Toscana, a.k.a. Joseph Anton Johann von Österreich" , Hungarian: "Habsburg-Toscanai József Antal János főherceg, a.k.a. József nádor" , Czech: "Josef Habsbursko-Lotrinský" , 9 March 1776, Florence – 13 January 1847, Buda), was the Palatine of Hungary from 1796 to 1847. He was the seventh son of Leopold II, Holy Roman Emperor and Maria Luisa of Spain.