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Hans Denck (c. 1495 – November 27, 1527) was a German theologian and Anabaptist leader during the Reformation.
Denck was born in 1495 in the Bavarian town of Habach. He entered the University of Ingolstadt on October 10th, 1517 and graduated in 1519.  Denck began working as a family tutor in Niederstotzingen.  By the recommendation of Johannes Oecolampadius, Denck became headmaster at the St. Sebaldus school in Nuremberg in 1523. He became involved in the trial of the artist brothers Sebald and Barthel Beham, who were expelled from the city in 1524 at the instigation of Andreas Osiander. In Nuremberg, he met Thomas Müntzer, and so first came in contact with radical theology, which he accepted with modifications. In consequence of his convictions, he was banished from Nuremberg in January 1524, and forced upon a wandering life, which he henceforth led until his death. 
In 1525 he went to Augsburg where he met in April 1526 Balthasar Hubmaier who impressed him very much and who most probably baptized him. In late 1526 he fled from there and arrived in Strasbourg in November 1526 where he stayed with Ludwig Haetzer, a like-minded Anabaptist. He was also expelled from there, and after a long time of wandering in Southern Germany and Switzerland he found refuge with Johannes Oekolampad in Basel. After attending the Martyrs' Synod in Augsburg, he returned to Basel where he died in 1527 of bubonic plague.  In his writings he fiercely attacked the reformers; together with Haetzer he translated the Biblical books of the Prophets into German (Worms 1527).
Denck was influenced by the German theologian Johannes Tauler's mysticism. For Denck the living, inner word of God was more important than the letters of the Scripture. This belief was contrary to the Lutheran belief of giving scripture primacy.  Denck thought of the Bible as a human product, the individual books being different witnesses of one truth. He did not value the scripture as the source of all true religious knowledge, but instead the spirit that speaks from within each person. For Denck the sacraments were only symbols: baptism a sign of commitment, communion a ceremony of remembrance.
Denck held that Christ is the embodiment the perfect person, never separated from God because he has always done God's will. Thus does Christ serve as model. Luther taught the doctrine of justification by faith whereas Denck's whole emphasis was put instead on discipleship to Jesus. Indeed, his motto was: "No one may truly know Christ except one who follows Him in life". 
It is not clear if Denck was Anti-Trinitarian. His enemies as well as modern Unitarian scholars have presented him as Anti-Trinitarian, despite the lack of evidence of this in Denck's own writings. Clearly though, he was a non-dogmatic Christian. 
Joachim Vadian and Johann Kessler accused Denck of Universalism,  but this is unlikely. 
Anabaptism is a Christian movement which traces its origins to the Radical Reformation.
The Schleitheim Confession was the most representative statement of Anabaptist principles, by a group of Swiss Anabaptists in 1527 in Schleitheim, Switzerland. The real title is Brüderliche vereynigung etzlicher Kinder Gottes siben Artickel betreffend ....
The Swiss Mennonite Conference is an Anabaptist Christian body in Switzerland.
Anabaptist theology, also known as Anabaptist doctrine, is a theological tradition reflecting the doctrine of the Anabaptist Churches. The major branches of Anabaptist Christianity agree on core doctrines but have nuances in practice. While the adherence to doctrine is important in Anabaptist Christianity, living righteously is stressed to a greater degree.
Balthasar Hubmaier was an influential German Anabaptist leader. He was one of the most well-known and respected Anabaptist theologians of the Reformation.
Pilgram Marpeck, also Pilgram Marbeck or Pilgrim Marpeck, was an important Anabaptist leader in southern Germany in the 16th century.
Melchior Hoffman was an Anabaptist prophet and a visionary leader in northern Germany and the Netherlands.
Sebastian Franck was a 16th-century German freethinker, humanist, and radical reformer.
Hans Sachs was a German Meistersinger ("mastersinger"), poet, playwright, and shoemaker.
Ludwig Haetzer was an Anabaptist.
Jacob Kautz was an Anabaptist who posted seven theses to the door of the Worms Cathedral in 1527. He undermined the authority of the church with accusations of idolatry. In essence, he took Martin Luther's protest to the logical conclusion that individual freedom of conscience should be enshrined in law.
Michael Sattler was a monk who left the Roman Catholic Church during the Protestant Reformation to become one of the early leaders of the Anabaptist movement. He was particularly influential for his role in developing the Schleitheim Confession.
Leonhard Schiemer was an early pacifist Anabaptist writer and martyr whose work survives in the Ausbund.
Hans Hut was a very active Anabaptist in southern Germany and Austria.
The Martyrs' Synod took place in Augsburg, Germany, from 20 to 24 August 1527. The purpose of this meeting, attended by about sixty representatives from different Anabaptist groups, was to come to agreement over the differences related to the central Anabaptist teachings among the Swiss and south German Anabaptists.
The Swiss Brethren are a branch of Anabaptism that started in Zürich, spread to nearby cities and towns, and then was exported to neighboring countries. Today's Swiss Mennonite Conference can be traced to the Swiss Brethren.
Urbanus Henricus Rhegius or Urban Rieger was a Protestant Reformer who was active both in Northern and Southern Germany in order to promote Lutheran unity in the Holy Roman Empire. He was also a popular poet. Martin Luther referred to him as the "Bishop of Lower Saxony".
Johannes Bünderlin was an Austrian Anabaptist. Bünderlin was a humanist Catholic priest who had been attracted to the Reformation in Moravia and was baptised by Johannes Denck. Bünderlin returned to Linz and preached there until forced to leave for Konstanz in 1529 at the invitation of Johannes Zwick, though Zwick soon considered that Bünderlin was too radical in his ideas and Bünderlin set out for Prussia.
Peter Schöffer the Younger was a German printer, the son of Peter Schöffer, a former apprentice of Johannes Gutenberg, and a grandson of Gutenberg's financier Johann Fust. He first worked in Mainz, where he set up his first workshop. He was an expert type caster, and his specialty was printing music. Schöffer moved to Worms in 1518, where he printed among other works the Tyndale Bible, which was the first mass-produced English edition of the New Testament, and the first complete German Protestant translation of the Bible. Later in life, he also worked in Straßburg, Venice and Basel.
Horst Weigelt is a German Protestant theologian. From 1975 to 2002 he was Professor of Historical and Systematic Theology at the Otto Friedrich University of Bamberg. His research focuses on the Reformation, Pietism and Enlightenment in the early modern period. He has also written specifically on Schwenkfelders.