In 1189 Philip, Archbishop of Cologne, requested Gisilbert, abbot of the Cistercian Himmerod Abbey in the Bishopric of Trier, to re-settle the deserted monastery of Petersberg with Cistercians from Himmerod.
Archbishop Philip of Cologne, in 1189, asked Gisilbert, the abbot of Cistercian Himmerod Abbey within the jurisdiction of the Bishopric of Trier, to re-colonize the deserted Petersberg monastery with monks from Himmerod.