In fact, he renounced his three doctoral degrees, and, according to one source, "gave excellent but infrequent lectures." In May 1523, Karlstadt was invited by the church of Orlamünde to be its pastor, and he accepted at once. Here he instituted all his radical reforms, and Orlamünde became the model of a congregationalist reformation. Church music and art were set aside, clerical matrimony was preached, and infant baptism was rejected. Perhaps most importantly, in Orlamünde Karlstadt denied the physical but affirmed the spiritual presence of Christ in the communion. From Spring 1524, Luther started to campaign against Karlstadt, denying his right to publish and preach without Luther's authorization. In June, Karlstadt resigned as archdeacon. In July, Luther published the "Letter to the Saxon Princes", in which he argued that Thomas Müntzer and Karlstadt agreed, and were both dangerous sectarians with revolutionary tendencies. On 22 August 1524, Luther preached in Jena. Karlstadt hid in the crowd during Luther’s preaching, and wrote to Luther, asking to see him. This led to the well-known confrontation at the Black Bear Inn in a conversation recorded by a Martin Reinhardt and published within a month. There were a number of misunderstandings between the two men. For example, Luther said that he was convinced that Karlstadt had revolutionary tendencies, despite the fact that Karlstadt had all along rejected violence in the name of religion, and rejected Thomas Müntzer's invitation to join the League of the Elect. Karlstadt's answer was published in 1524 in Wittenberg, and is still extant. This showed that Karlstadt continued to reject the violence that led to the German Peasants' War. Another defamation was Luther's accusation that Karlstadt was not authorized to preach at the city church in Wittenberg during Luther’s stay at Wartburg. The conversation ended when Luther gave Karlstadt a guilder and told him to write against him. In September 1524 Karlstadt was exiled from Saxony by Frederick the Wise and George, Duke of Saxony. Luther also wrote against Karlstadt in his 1526 "The Sacrament of the Body and Blood of Christ—Against the Fanatics". When the Peasant War broke out, Karlstadt was threatened and wrote to Luther and asked for assistance. Luther took him in, and Karlstadt lived secretly in Luther's house for eight weeks. However, Karlstadt had to sign a pseudo retraction, titled “Apology by Dr. Andreas Karlstadt Regarding the False Charge of Insurrection Which has Unjustly Been Made Against Him.”