Question: The queen of Castile, Joanna of Castile, married this member of the house of Habsburg who was the son of which monarch?
Sentence (from "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.
Relevant evidence: Yes