Are Measure for Measure and Mathis der Maler both fictional?
Mathis der Maler (opera) Mathis der Maler ("Matthias the Painter") is an opera by Paul Hindemith. The opera's genesis lay in Hindemith's interest in the Reformation. The work's protagonist, Matthias Grünewald, was an actual historical figure who flourished in that era, and whose art, in particular the Isenheim Altarpiece, inspired many creative figures in the early 20th century, including Joris-Karl Huysmans's novel "Là-bas".
Poseur A "poseur" (or "poser") is someone who "poses for effect, or behaves affectedly", who "affects a particular attitude, character or manner to impress others", or who pretends to belong to a particular group. A poseur may be a "person who pretends to be what he or she is not" or an "insincere person". A "poseur" may have a flair for drama or behave as if they are onstage in daily life. Sometimes "poseuse", a feminine version of the word, is used.