A comparative analysis of Georg Christoph Eimmart’s engravings and Master Grahovar’s miniatures reveals that the painter developed various creative strategies in his adoption and emulation of the prototypes. He never produced an exact copy or a dull imitation. He was also careful to signal a distinction in his claim of authorship, taking the credit for the illumination with the usual “Grahover pinx.” or pointing out the fact that he was also the inventor of the composition with “Grahover inv. et pinx.” Grahovar’s practice of signing the miniatures, however, does not conform to the modern concept of authorship and his criteria remain elusive.