which cities were the center of calvinism and lutheranism
History of Calvinism Huldrych Zwingli, whose theology is considered the first expression of Reformed theology[1] was appointed to ministry in Zürich, Switzerland, in 1519.[2] He was influenced by Renaissance humanist Desiderius Erasmus, which led him to study the New Testament and the early Church Fathers as well as to preach from the Bible.[3] Zwingli was also aware of and influenced by the Wittenberg reformer Martin Luther, but he developed his theology independently and differed with him in several ways. Zwingli opposed any religious practice for which he could find no scriptural justification, such as the use of images, organs, and singing in worship while Luther actively opposed the destruction of images in churches. Zwingli's emphasis on strict adherence to God's command as found in his word also lead to greater moral activism in Zwinglian Reformation movements than in Lutheran ones.[4]