Besides Martin Luther who was another leader promoting change in the church?

Another significant leader promoting change in the church during the Reformation was John Calvin. He is best known for his role in the development of Calvinism, which emphasized predestination and a more structured church governance. Calvin's theological writings and his establishment of a theocratic government in Geneva influenced Protestant thought and practices across Europe. His ideas contributed to the broader movement for reform in Christianity, challenging the authority of the Catholic Church.