page_title: Duchy of Pomerania
section_title: Conversion and the Pomeranian diocese
hierarchical_section_title: Duchy of Pomerania / Origins / Conversion and the Pomeranian diocese
caption_attribution_description: English: Coat of arms of the bishopric of Kammin
context_page_description: The Duchy of Pomerania was a duchy in Pomerania on the southern coast of the Baltic Sea, ruled by dukes of the House of Pomerania.
  The duchy originated from the realm of Wartislaw I, a Slavic Pomeranian duke, and was extended by the Lands of Schlawe and Stolp in 1317, the Principality of Rügen in 1325, and the Lauenburg and Bütow Land in 1455. During the High Middle Ages, it also comprised the northern Neumark and Uckermark areas as well as Circipania and Mecklenburg-Strelitz.
  The Duchy of Pomerania was established as a vassal state of Poland in 1121, which it remained until the fragmentation of Poland after the death of Polish ruler Bolesław III Wrymouth in 1138. Afterwards the Dukes of Pomerania were independent, and later were vassals of the Duchy of Saxony from 1164 to 1181, of the Holy Roman Empire from 1181 to 1185, of Denmark from 1185 to 1227 and the Holy Roman Empire again from 1227 to 1806. Most of the time, the duchy was ruled by several Griffin dukes in common, resulting in various internal partitions. After the last Griffin duke had died during the Thirty Years' War in 1637, the duchy was partitioned between Brandenburg-Prussia and Sweden.
context_section_description: A first attempt to convert the Pomeranians was made following the subjugation of Pomerania by Boleslaw III of Poland. In 1122, Spanish monk Bernard (also Bernhard) travelled to Jumne (Wolin), accompanied only by his chaplain and an interpreter. The Pomeranians however were not impressed by his missionary efforts and finally threw him out of town.
  Bernard was later made the first bishop of Lubusz in Poland.
  After Bernard's misfortune, Boleslaw III asked Otto of Bamberg to convert Pomerania to Christianity, which he accomplished in his first visit in 1124–25. Otto's strategy severely differed from the one Bernard used: While Bernard travelled alone and as a poor and unknown priest, Otto, a wealthy and famous man, was accompanied by 20 clergy of his own diocese, numerous servants, 60 warriors supplied to him by Boleslaw, and carried with him numerous supplies and gifts. After arriving in Pyritz, the Pomeranians were assured that Otto's aim was not the gain of wealth at the expense of the Pomeranian people, as he was wealthy already, but only to convert them to Christianity, which would protect the Pomeranians from further punishment by God, as which the devastating Polish conquest was depicted. This approach turned out to be successful, and was backed by parts of the Pomeranian nobility that in part was Christian raised already, like duke Wartislaw I, who encouraged and promoted Otto's mission. Many Pomeranians were baptized already in Pyritz and also in the other burghs visited.
  Otto of Bamberg returned in 1128, this time invited by duke Wartislaw I himself, aided by the emperor Holy Roman Emperor Lothar II, to convert the (Lutician) Slavs of Western Pomerania just incorporated into the Pomeranian duchy, and to strengthen the Christian faith of the inhabitants of Stettin and Wollin, who fell back into heathen practices and idolatry. Otto this time visited primarily Western Pomeranian burghs, had the temples of Gützkow and Wolgast torn down and on their sites erected the predecessors of today's St Nikolai and St Petri churches, respectively. The nobility assembled to a congress in Usedom, where they accepted Christianity on June 10, 1128. Otto then was titled apostolus gentis Pomeranorum, made a saint by pope Clement III in 1189, and was worshipped in Pomerania even after the Protestant Reformation.
  In 1140, one year after Otto of Bamberg's death, a Pomeranian diocese was founded and placed directly under the Holy See. Adalbert of Pomerania, who had participated in Otto's mission as an interpreter and assistant, was made the first bishop. The direct subordination under the pope thwarted the claims of the archbishops of Magdeburg and Gniezno, who both had asserted pressure on Otto of Bamberg to incorporate the new diocese into their realms. The initial see of the Pomeranian diocese was Wollin, and was moved to Grobe Abbey on the island of Usedom and to Kammin (Cammin, now Kamien Pomorski) after 1150 and 1175, respectively. Since 1188, when the pope accepted the move of the see, the bishopric was referred to as Roman Catholic Diocese of Kammin, while before it was addressed as Pomeranian diocese.
  In 1248, the Kammin bishops and the Pomeranian dukes had interchanged the terrae Stargard and Kolberg, leaving the bishops in charge of the latter. 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. When in 1276 they became the sovereign of the town of Kolberg also, they moved their residence there, while the administration of the diocese was done from nearby Köslin. The bishops at multiple occasions tried to exclude their secular reign from ducal overlordship by applying for Imperial immediacy (Reichsunmittelbarkeit). The Pomeranian dukes successfully forestalled these ambitions, and immediacy was granted only temporarily in 1345.
caption: Kammin diocese
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