Johann Stephan Rittangel (1606-1652) was a Christian Hebraist and Professor of Oriental Languages at the University of Königsberg (Prussia) from 1640 till his death. Born Jewish, he converted to Christianity (to Catholicism and afterward to Calvinism, and then Lutheranism). After making a translation of the Sefer Yetsirah into Latin in 1642, he made this translation of the Passover Haggadah. In the Haggadah, Rittangel included musical scores for two piyyutim popularly sung during the final course of the Passover seder: “Adir Hu” and “Ki Lo Na’eh.” . . .