Why did Henry IV convert from Protestantism to Roman Catholicism in 1593?

Henry IV converted to Roman Catholicism in July 1593 primarily to secure his kingdom and end the protracted religious strife and civil war that had left France on the brink of disintegration.12

As a Protestant, Henry faced significant resistance from the Holy League, which prevented him from capturing Paris and effectively ruling the country. Although he had achieved military victories, the war dragged on, and he realized it had to be concluded at any cost to restore stability. His conversion removed the primary legitimate pretext for resistance against his reign. Following this decision, support for his rule grew, leading to the submission of key cities like Orléans and Lyon, and eventually the surrender of Paris in 1594.12

By reconciling with the Catholic Church, Henry was able to pacify the nation, eventually issuing the Edict of Nantes in 1598, which established Catholicism as the state church while granting religious freedom and civil rights to Protestants.12