sentences:  Heidenheim immediately began an edition of the Maḥzor, with a Hebrew commentary by himself and a German translation by himself and Breidenbach (1800).In order to give a correct text, Heidenheim had secured the most ancient manuscripts, among them being one of the year 1258, as well as the earliest Italian and German editions.At the end of the Maḥzor to Shemini Aẓeret there is printed Heidenheim's "Ha-Piyyuṭim veha-Payeṭanim," an essay on the liturgists.