This article is primarily focused on a group of seven glass portraits out of almost 30 glass and rock crystal engravings ascribed to Caspar Lehmann. The role of the iconographic sources in the assessment of these glass pieces as well as the way the sources were used by the engraver is explored.
The identified print sourc- es can ultimately help us to recognise Lehmann's style of engraving more thoroughly and either support his attribution or challenge it.