Oct. 31, 2017, marks the 500th anniversary of the Reformation, an event that created fissures and theological questions that have defined the landscape of contemporary Christianity. While theologians from both Protestant and Catholic backgrounds continue to work toward greater unity, the questions and challenges brought about by the Reformation are still animating important discussions in modern Christian circles. We have collected our best articles on this topic to help you delve deeper into this historic event in Christian history.