What religious movement sparked by martin lutherdivided the christian church into two branches?

The religious movement sparked by Martin Luther was the Protestant Reformation, which began in the early 16th century. Luther's critique of the Catholic Church, particularly his 95 Theses, challenged its practices and doctrines, leading to the emergence of Protestantism. This movement ultimately divided Christianity into two main branches: Roman Catholicism and Protestantism, which encompasses various denominations.