Upon the Wendish Crusade in 1147, he was able to found a cathedral chapter at Havelberg and to begin the building of Havelberg Cathedral, which was consecrated in 1170.
Ved vendiske korstog i 1147 var han i stand til at stifte et katedralskapitel i Havelberg og begynde opbygningen af ​​Havelberg katedralen, som blev indviet i 1170.