(1198–1201), the oldest son of Duke Bolesław, and Duke of Opole, was the first prince to become Bishop of Wrocław (see prince-bishop). Cyprian (1201–7) was originally Abbot of the Premonstratensian monastery of St. Vincent near Wrocław, then Bishop of Lubusz, and afterwards Bishop of Wrocław. During Cyprian's episcopate Duke Heinrich I and his wife, St. Hedwig, founded the Cistercian convent at Trzebnica. The episcopate of Bishop Wawrzyniec (1207–32) was marked by his efforts to bring colonies of Germans into the church territories, to effect the cultivation of waste lands. This introduction of German settlers by the bishop was in accordance with the example set by Duke Henry the Bearded and Duchess consort St. Hedwig. The monasteries of the Augustinian Canons, Premonstratensians and Cistercians took an active part in carrying out the schemes of the rulers by placing great numbers of Germans, especially Thuringians and Franconians, on the large estates that had been granted them. One of the most noted bishops of the diocese, Tomasz I (1232–68), continued the work of German colonization with so much energy that even the first Mongol invasion of Poland (1241) made but a temporary break in the process. As German colonization in Silesia increased, the city of Wrocław began to be also known by the Germanized name of Breslau, leading to the diocese also becoming called the Bishopric of Breslau. Tomasz's defence of the rights of the Church involved him in bitter conflicts with Duke Bolesław II the Horned. Tomasz began the construction of the present cathedral, the chancel being the first part erected. St. Hedwig died during his episcopate; and he lived until the process of her canonization was completed, but died before the final solemnity of her elevation to the altars of the Catholic Church. After Tomasz I, Ladislaus, a grandson of Saint Hedwig, and Archbishop of Salzburg, was Administrator of the Diocese of Wrocław until his death in 1270. He was followed by Tomasz II Zaremba (1270–92), who was involved for years in a violent dispute with Duke Henryk IV Probus as to the prerogatives of the Church in Silesia. In 1287 a reconciliation was effected between them at Regensburg, and in 1288 the duke founded the collegiate church of the Holy Cross at Wrocław. Before his death, on the Eve of St. John in 1290, the duke confirmed the rights of the Church to sovereignty over the territories of Nysa and