Adalbert of Prague (, , , , ; 95623 April 997), known in the Czech Republic, Poland and Slovakia by his birth name Vojtěch (), was a White Croatian missionary and Christian saint. He was the Bishop of Prague and a missionary to the Hungarians, Poles, and Prussians, who was martyred in his efforts to convert the Baltic Prussians to Christianity. He is said to be the composer of the oldest Czech hymn Hospodine, pomiluj ny and Bogurodzica, the oldest known Polish hymn, but his authorship of them has not been confirmed. Adalbert was later declared the patron saint of the Czech Republic, Poland, and the Duchy of Prussia. He is also the patron saint of the Archdiocese of Esztergom in Hungary. Life Early years Born as Vojtěch in 952 or ca. 956 in gord Libice, he belonged to the Slavnik clan (of White Croatian origin), one of the two most powerful families in Bohemia. Events from his life were later recorded by a Bohemian priest Cosmas of Prague (1045–1125). Vojtěch's father was Slavník (d. 978–981), a duke ruling a province centred at Libice. His mother was Střezislava (d. 985–987), and according to David Kalhous belonged to the Přemyslid dynasty. He had five brothers: Soběslav, Spytimír, Dobroslav, Pořej, and Čáslav. Cosmas also refers to Radim (later Gaudentius) as a brother; who is believed to have been a half-brother by his father's liaison with another woman. After he survived a grave illness in childhood, his parents decided to dedicate him to the service of God. Adalbert was well educated, having studied for approximately ten years (970-80) in Magdeburg under Adalbert of Magdeburg. The young Vojtěch took his tutor's name "Adalbert" at his Confirmation. Episcopacy In 981 Adalbert of Magdeburg died, and his young protege Adalbert returned to Bohemia. Later Bishop Dietmar of Prague ordained him a Catholic priest. In 982, Bishop Dietmar died, and Adalbert, despite being under canonical age, was chosen to succeed him as Bishop of Prague. Amiable and somewhat worldly, he was not expected to trouble the secular powers by making excessive claims for the Church. Although Adalbert was from a wealthy family, he avoided comfort and luxury, and was noted for his charity and austerity. After six years of preaching and prayer, he had made little headway in evangelizing the Bohemians, who maintained deeply embedded pagan beliefs. Adalbert opposed the participation of Christians in the slave trade