Huldrych or Ulrich Zwingli (1 January 1484 – 11 October 1531) was a Swiss Christian theologian, musician, and leader of the Reformation in Switzerland. Born during a time of emerging Swiss patriotism and increasing criticism of the Swiss mercenary system, he attended the University of Vienna and the University of Basel, a scholarly center of Renaissance humanism. He continued his studies while he served as a pastor in Glarus and later in Einsiedeln, where he was influenced by the writings of Erasmus. During his tenures at Basel and Einsiedeln, Zwingli began to familiarize himself with many criticisms Christian institutions were facing regarding their reform guidance and garnered scripture which aimed to address such criticisms.
In 1519, Zwingli became the Leutpriester (people's priest) of the Grossmünster in Zurich where he began to preach ideas on reform of the Catholic Church. In his first public controversy in 1522, he attacked the custom of fasting during Lent. In his publications, he noted corruption in the ecclesiastical hierarchy, promoted clerical marriage, and attacked the use of images in places of worship. Among his most notable contributions to the Reformation was his expository preaching, starting in 1519, through the Gospel of Matthew, before eventually using Biblical exegesis to go through the entire New Testament, a radical departure from the Catholic mass. In 1525, he introduced a new communion liturgy to replace the Mass. He also clashed with the Anabaptists, which resulted in their persecution. Historians have debated whether or not he turned Zurich into a theocracy.
