In Prague, wicked men gathered on the holiday of Pesach in the year 5149 and rose up against the people of HaShem with swords and axes and slew them in the streets, and their houses they burned with fire and they brought out the aged from their graves. See the selichah composed by Rabbi Avigdor Kara that begins "Et kol hatlaa" (All the suffering), and this was in the days of Kaiser Wenceslaus, king of Bohemia, and there was no fear of the kingdom, rather each man did what was right in his own eyes, [(Tzeda) (see above year 5179 and see Shomer HaDat, letter 117, section 2)]: