After King Phillip died in 1598, Spain’s power slowly rose back up to the greatness it enjoyed during the Golden Age of Power in the late 1400’s.

False.

Explanation:

The given statement is false because it was not after the death of King Philip II but in his reign that Spain enjoyed it's Golden Age of Power.

Philip II was the King of Spain from 1556 to 1598 and King of Portuguese from 1580-1598. Philip succeeded the throne of Spain from his father Ferdinand, who succeeded the throne from his brother Charles V.

After Philip came to the throne of Spain, Spain enjoyed the Golden Age of power. Philip was an art lover and a great defender of Catholism. The great strength of Spain lied in its army.

So, the given statement is false.