Spain’s integration into the Habsburg Empire and its control over highly profitable silver mines made it stronger than Portugal in the 1500s, and for a roughly 60-year period starting in the late 1500s the Habsburg king ruled Portugal as well. Both translated their wealth into golden ages of art and technology. The Spanish Empire grew so large it became known as “the empire on which the sun never sets”—an expression that would later be used to describe the British Empire.
