John Knox (1514–1572) was a Scottish Protestant reformer and the founder of the Presbyterian Church in Scotland. Initially a Catholic priest, he became a key figure in the Scottish Reformation. He was known for advocating for a break from the Roman Catholic Church. He also helped in the establishment of a reformed Protestant Church. Influenced by the teachings of John Calvin, he led the resistance against Catholicism, particularly under the reign of Mary, Queen of Scots. His efforts led to establishing Presbyterianism as Scotland’s dominant form of worship. God significantly used him in shaping the country’s religious landscape. Mary Queen of Scots is quoted as saying, “I fear the prayers of John Knox more than all the assembled armies of Europe.”