Saint Otto of Bamberg (German: Otto von Bamberg) (1060 or 1061 – 30 June 1139) was a medieval German bishop and missionary who, as papal legate, converted much of Pomerania to Christianity.
Otto was born into a noble family in Mistelbach, Franconia. Serving initially in the household of Duke Władysław I Herman of Poland, he entered the service of the Emperor Henry IV in 1090 and was appointed Chancellor of the Holy Roman Empire in 1101.
In 1102, the Emperor appointed and invested him as Bishop of Bamberg in Franconia (now in the state of Bavaria), and Otto became one of the leading princes of medieval Germany. During his tenure as bishop, Bamberg rose to great prominence, while Otto achieved fame as a missionary and as a diplomat and politician, notably during the Investiture Controversy between Emperor Henry IV and the papacy during which he remained loyal to the emperor. As a consequence, he was suspended by a papal party at the Synod of Fritzlar in 1118. At the Congress of Würzburg in 1121 Otto successfully negotiated the peace treaty, the Concordat of Worms, which was signed in 1122 at Worms.
As bishop, Otto led a model, simple and frugal life, but did much to improve his ecclesiastical and temporal realms. He rebuilt and completed Bamberg Cathedral after it had been destroyed by fire in 1081, improved the cathedral school, established numerous monasteries and built a number of churches throughout his territory and in Pomerania, and greatly expanded the town of Bamberg.
Among his great accomplishments was his peaceful and successful missionary work among the Pomeranians, after several previous forcible attempts by Poles and Italians to convert Pomerania to Christianity had failed. Otto became the papal legate, converted a large number of Pomeranians, notably in the towns of Pyritz, Kammin, Stettin (Szczecin), and Julin, and established eleven churches, and became known as the "Apostle of Pomerania."
After he returned to Bamberg in 1125, some pagan customs began to reassert themselves, and Otto journeyed once more to Pomerania in 1128. In the Diet of Usedom, he succeeded in converting all the nobles, converted further communities, and sent priests from Bamberg to serve in Pomerania. His intent to consecrate a bishop for Pomerania was thwarted by the bishops of Magdeburg and Gnesen (Gniezno) who claimed metropolitan rights over Pomerania. Only after his death in 1139 was his former companion, Adalbert of Pomerania, consecrated as Bishop of Julin, in 1140. In 1188 the Diocese of Wolin had its seat moved to Kammin, and was made directly subject to the Holy See.
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