Equestrian statue of King Philip IV. He reigned during a period encompassing the heights of Spanish power.
He reigned Spain from 1621 to his death in 1665. He also was King of Portugal from 1621 - 1640.
He is sometimes called Planet King (Spanish: Rey Planeta). He reigned through the majority of the Thirty Years' War in Europe.
On the positive side, he was a strong supported of the arts and theater.