Bolesaw I the Brave 967 June 1025, less often known as Bolesaw I the Great , was Duke of Poland from 992 to 1025, and the first King of Poland in 1025. As Boleslav IV, he was also Duke of Bohemia between 1002 and 1003. He was the son of Mieszko I of Poland by his wife, Dobrawa of Bohemia. According to a scholarly theory, Bolesaw ruled Lesser Poland already during the last years of his fathers reign. Mieszko I, who died in 992, divided Poland among his sons, but Bolesaw expelled his fathers last wife, Oda of Haldensleben, and his halfbrothers and reunited Poland between 992 and 995.
Bolesaw was born in 966 or 967, the first child of Mieszko I of Poland and his wife, the Bohemian princess Dobrawa. His Epitaph, which was written in the middle of the 11th century , emphasized that Bolesaw had been born to a faithless father and a truebelieving mother, suggesting that he was born before his fathers baptism. Bolesaw was baptized shortly after his birth. He was named after his maternal grandfather, Boleslaus I, Duke of Bohemia. Not much is known about Bolesaws childhood. His Epitaph recorded that he underwent the traditional haircutting ceremony at the age of seven and a lock of his hair was sent to Rome. The latter act suggests that Mieszko wanted to place his son under the protection of the Holy See. Historian Tadeusz Manteuffel says that Bolesaw needed that protection because his father had sent him to the court of Otto I, Holy Roman Emperor in token of his allegiance to the emperor. However historian Marek Kazimierz Baraski notes that the claim that Bolesaw was sent
Source: Wikipedia