When in 1939 Friedrich Klingner's new edition of Horatius, published in the"Bibliotheca Teubneriana" deposed the hitherto authoritative text edited by Vollmer, this had an epoch-making effect on both teaching and research. Klingner's text held a leading position internationally over many decades. Klingner's edition was a keystone in particular for students of Latin in the tradition of German grammar schools and universities. Even today, scholars continually have recourse to Klingner's constitution of the text. Following numerous enquiries from customers, the publishers have decided to re-issue Klingner's Horatius text as an unrevised reprint of the 3rd edition from 1959.