Furthermore, he gives over his castle and his fortune to the young order. Gottfried thereby becomes the last of the mighty counts of Cappenberg. His younger brother Otto of Cappenberg was godfather of Frederick I of Staufen. In 1155, Otto received as a gift from the recently crowned king the famous Cappenberg bust reliquary, a reliquary in the form of a bust of Frederick. 1123 – Kamp Abbey becomes the first Cistercian monastery in the German-speaking area. 1145 – The Knights Hospitallers opens its first foundation on German soil, by the walls of Duisburg, and builds the Marienkirche (church) there. 1152–1154 – A few months after his election to King, Frederick I of Staufen (Barbarossa) convenes a council (Hoftag) in Dortmund. But two years later, he and his retinue convene in the Palatinate. On both occasions, the mighty Duke of Saxony, Henry the Lion, is also present. 1160 – The County of Mark comes into being as a result of the division of the inheritance of the Count von Berg. 1173 – Emperor Frederick Barbarossa grants Duisburg the right to hold two fortnightly cloth fairs annually. 1199 – Completion of the Isenburg at Hattingen as the new power centre of the County of Isenberg an der Ruhr. 1200 – In Dortmund, large town walls are erected around the town. Its course is still retained in the inner city in the form of an embankment ("Wälle"). 1225 – Murder of the archbishop of Cologne, Engelbert I of Cologne, by Frederick of Isenberg. Frederick is executed, the larger part of the Grafschaft Isenberg an der Ruhr falls to his relative, the Count von der Mark. The Isenburg and the castle and town of Nienbrügge are razed. The Isenbergers had to accommodate themselves to the County of Limburg. 1225–1226 Settlers from Nienbrügge were settled in Ham between the Ahse and Lippe rivers by Count Adolphus of the Mark and received town rights from him in 1226. The old designation of Ham, a tongue of land between two rivers, becomes the name of the town, Hamm. 1228 – The Archbishop of Cologne takes over the Vest Recklinghausen. 1240 – The Dortmund Council obtained a house on the Markt vom Grafen von Dortmund. For centuries it was the Rathaus of the Reichsstadt. 1243 – The Wasserburg Strünkede in Herne is first mentioned in connection with a feud between Cologne and Cleves. Since the 12th century,