by the Count of Mark 1397 – The Battle of Kleverhamm consolidates the position of the Count of the Mark. 1403 – The Wildungen Altar is completed – the first work of the Dortmund artist Conrad von Soest. 1424 – In the war between the two brothers Adolphus and Gerhard of the Mark, Hattingen is conquered by Berg troops and completely burned down, apart from two houses. The town must be re-built anew. 1444–1449 – Soest Feud, the towns of Dorsten and Recklinghausen in the Vest Recklinghausen are bases for the power struggle of the Archbishop of Cologne. In March 1445, a night attack by the Köln troops on the town walls of Duisburg is detected just in time and fended off. During action in the territory of Dortmund, the Steinerne Turm is besieged and damaged. 1486 – Two Landtag sittings agree to the raising of a special tax in the Grafschaft Mark for the benefit of Duke John II of Cleves. The relevant account book, the Schatboick in Mark, contains a note of all tax obligations and thereby contains much information on the district. Early Modern Period 1508 – When the "French Sickness", syphilis, first appears in Dortmund the entire population (including children) is seriously affected. 1518–1519 – In Dortmund, a conflict breaks out between the citizens and the clergy over the privileges of the clergy, such as exemption from taxes. These events can viewed in connection with the Reformation. 1521 – Cleves-Mark acquires Jülich and Berg (which themselves had amalgamated) through inheritance (forming Jülich-Cleves-Mark). 1529 – Sweating sickness is rampant. Death follows a few hours after symptoms first occur. In Dortmund, within the first four days of the epidemic 497 people die from 500 affected by the disease. 1538 – In the imperial city of Dortmund, Baptists start to become active. Their activities are prevented by the council. When one of the preachers, Peter von Rulsem, decides not to cease his activities, he is executed. 1541 – In Wesel, printing is introduced. Two years later, it was being practised in Dortmund, which becomes one of the important centres of printing in the 16th century. 1543 – As a complement to the church's Latin Schools, the Council and citizens of Dortmund found a humanist grammar school. The teaching is influenced by the established grammar school in Emmerich and the Paulinum in Münster. One of the pupils at the Dortmund