The diocese was rooted in the Conversion of Pomerania by Otto of Bamberg in 1124 and 1128 at the behest of Polish ruler Bolesław III Wrymouth,[3] and was dissolved during the Protestant Reformation, when the Pomeranian nobility adopted Lutheranism in 1534 and the last pre-reformatory bishop died in 1544.

[4] In 1000, the Diocese of Kołobrzeg was founded by Polish monarch Bolesław I the Brave, covering ecclesiastical authority over the region of Pomerania.

[5] After Duke Bolesław III Wrymouth of Poland had conquered Pomerania until 1121/22, Saint Otto of Bamberg between 1124 and 1128 Christianised the area.

[11][12] Otto during his lifetime did not succeed in founding a diocese, caused by a conflict of the archbishops of Magdeburg and Gniezno about ecclesiastical hegemony in the area.

[21] In the late 12th century the territory of the Griffin dukes was raided several times by Saxon troops of Henry the Lion and Danish forces under King Valdemar I.

[32] In the Southwest, the border of the diocese ran south to a line Güstrow-Ivenack-Altentreptow in a near straight west–east orientation, then took a sharp southward turn west of Ueckermünde to include Prenzlau.

[32] When Emperor Frederick I Barbarossa deposed Henry the Lion in 1180 he granted Pomerania under Bogislaw I the status of an Imperial duchy, but from 1185 it was a Danish fief until the 1227 Battle of Bornhöved.

[1] In the following, the bishops extended their secular reign which soon comprised the Kolberg (now Kołobrzeg), Köslin (also Cöslin, now Koszalin) and Bublitz (now Bobolice) areas.

[1] Bishop Hermann von Gleichen granted town rights to Köslin (Koszalin) in 1266 and Massow (Maszewo) in 1278.

[1] In the early 13th century, the Słupsk and Sławno lands passed to the Archdiocese of Gniezno, only to return to the Diocese of Kamień in 1317.

The episcopal territory of secular reign remained a subfief of ducal Pomerania, and did not become an immediately imperial fief.