Since the 1926 edition of C. Hosius’s critical commentary on Mosella by Ausonius, no comparable German-language work has been published. In this new edition, the Latin text is accompanied by a comprehensive critical apparatus and a German prose translation. The work’s linguistic forms, actual contents, and underlying historical situation are elucidated, and the material is made accessible with extensive indices. An indispensable commentary for scholars of Latin and ancient history alike.