Boleslaus I, Duke of Bohemia
Boleslaus I (Czech: Boleslav I. Ukrutný; 915–972), a member of the Přemyslid dynasty, was ruler (kníže, "prince") of the Duchy of Bohemia from 935 until his death in 972. He is notorious for the murder of his elder brother Wenceslaus, through which he became duke.
Boleslaus I
September 935 – 15 July 967/972
915
972 (aged 57)
Despite his complicity in this fratricide, Boleslaus is generally respected by Czech historians as an energetic ruler who significantly strengthened the Bohemian state and expanded its territory.[1] His accomplishments include significant economic development due to an expansion in trade, the introduction of silver mining and the minting of the first local coinage, the Prague denarius.
Boleslav's wife may have been Biagota. It is unknown if she was the mother of all four of his adult children: