Adalbert of Prague was a 10th-century Benedictine monk, missionary, and the Bishop of Prague. Born Vojtěch into the powerful Slavnik clan in Libice, he later adopted the name Adalbert after his mentor in Magdeburg. Though he served as bishop in Bohemia, his attempts to reform local customs and oppose the slave trade led to political friction and periods of exile in Rome. He eventually dedicated himself to missionary work among various peoples, ultimately meeting a martyr's death while attempting to convert the Prussians near the Vistula Lagoon.