Who ruled spain in the 1500s?

In the early 16th century, the Crown of Castile and the Crown of Aragon were the major powers in Spain rather than a unified Kingdom of Spain.

Castile

- Philip I and Joanna (King and Queen of Castile, 1504–1506)

- Ferdinand I (Ferdinand V of Aragon) (King Regent, 1506–1516)

- Charles I (King, 1516–1556)

- Philip II (King, 1556–1598)

Aragon

- Joanna and Philip I (Queen and King of Aragon, 1504–1506)

- Ferdinand II (King, 1506–1516; Regent, 1516–1517)

- Charles I (King, 1516–1556)

- Philip I (King, 1556–1598)