Abstract
The author follows information of the Czech chroniclers and annalists about the first three crusades. She states the lack of the more detailed information about the events of the crusades. - Only the doyen of the Prague chapter Cosmas paid major attention to the assault on the Jews in Prague during the first crusade. - The lack of information could be caused by the small interest of the Bohemian medieval authors for the events, which took place in the far countries and by the lack of information about the crusades in Bohemia.