Protestant Churches are a branch of Christianity that originated in the 16th century during the Reformation, a movement aimed at reforming the practices and beliefs of the Roman Catholic Church. Key figures, such as Martin Luther and John Calvin, challenged certain doctrines and emphasized the authority of the Bible, leading to the establishment of various denominations. Today, Protestant Churches encompass a wide range of beliefs and practices, including Baptists, Methodists, and Lutherans. They generally emphasize personal faith, the priesthood of all believers, and the importance of community worship. Each denomination may have its own interpretations of scripture and traditions.