Otto of Bamberg was a 12th-century German bishop and missionary who served the Catholic Church as the Prince-Bishop of Bamberg from 1102 until 1139. Born into a noble Swabian family around 1060, he held several significant roles, including chaplain to the Polish court and imperial chancellor under Henry IV. He is widely recognized for his diplomatic efforts during the Investiture Controversy and his extensive missionary work, which earned him the title of the Apostle of Pomerania.