At the turn of 1419 and 1420, Wrocław found itself at the center of great politics. King Sigismund of Luxembourg called the Imperial Diet to Wrocław, where key issues were to be decided, including the fate of the Polish-Teutonic conflict, and the planned crusade in Bohemia against the Hussites. An immense number of dignitaries gathered, tense political situation, and the impending armed resolution of the conflict with the Hussites echoed even at the preachers' pulpit. On Christmas Day, the Auxiliary Bishop of Wrocław, Tylmann Wessel, decided to preach about the peace of the Church, threatened by the Hussites, and the role King Sigismund of Luxembourg would play in establishing peace. Therefore, the subject of the presentation will be an analysis of Bishop Wessel’s Christmas sermon and its political message.