These are paste papers from an early 20th-century edition of the German translation of Le déserteur, an opéra comique by the French composer Pierre-Alexandre Monsigny. Book from the collection of Leon Laserson.
This cover decoration is just an ink drawing on a canvas material of the cover that wasn't even properly fixed on the cardboard. Add not-really-straight lettering, voila! Metamorphoses by Publius Ovidius Naso. German edition, from 1897.