- In France in the 1500s, Calvinism spread and formed the Huguenot church, while Catholic and Huguenot armies began fighting in the French Wars of Religion. This period of conflict weakened the monarchy and heightened tensions between Catholics and Huguenots. The St. Bartholomew's Day Massacre in 1572 further escalated tensions when Catholic mobs killed thousands of Huguenots. The wars finally ended in 1598 with the Edict of Nantes, which granted Huguenots religious toleration.
- In Spain, the vast Habsburg Empire of Charles V was divided, with Philip II ruling Spain, the Netherlands, and the Americas as Europe's most powerful monarch. Philip suppressed re