Joanna or Joan was queen of Castile from 1504 and queen of Aragon from 1516 to her death in 1555. She was the daughter of Queen Isabella I of Castile and King Ferdinand II of Aragon. Joanna was marrie
Portrait by Juan de Flandes, c. 1500
Joanna with her parents, Isabella and Ferdinand; "Rimado de la conquista de Granada", by Pedro Marcuello, c. 1482
The marriage contract of Joanna and Philip (1496).
Joanna of Castile and Philip the Fair, stained glass, Basilica of the Holy Blood in Bruges.
Catherine of Austria or Catherine of Spain was a Queen of Portugal as the wife of King John III, and a regent during the minority of her grandson, King Sebastian, from 1557 until 1562.
Portrait by Anthonis Mor, 1552
Altarpiece by Cristóvão Lopes in the Convent of Madre de Deus in Lisbon depicting Catherine of Austria with her namesake, St. Catherine of Alexandria. Currently on display in the National Museum of Ancient Art in Lisbon.