Which country was the most and powerful in the 16th century?

In the 16th century, Spain emerged as the most powerful country, largely due to its vast empire and wealth derived from colonies in the Americas. The Spanish monarchy, particularly under King Charles I and later Philip II, wielded significant influence in European and global politics. Spain's dominance was marked by military conquests, a strong navy, and the establishment of trade routes, which positioned it at the forefront of the Age of Exploration. Additionally, the Spanish Inquisition and religious conflicts further shaped its power dynamics during this period.