Boleslav I of BohemiaBoleslav (or Boleslaus) I the Cruel
(? - 972
), was the Duke of Bohemia
from 935 to 972.
His father was Vratislav I
of Bohemia, Duke of Bohemia. Boleslav I had a son named Boleslav II the Pious of Bohemia, Duke of Bohemia, and a sister named Dobrava/Dubrawka
of Bohemia .
He murdered his older brother Václav/Wenceslas, the first Duke of Bohemia to convert to Christianity.