One of these opens a curtain in the painting
Hans Sebald Beham depicted one of these objects between Adam and Eve in one engraving and Jose Guadalupe Posada often displayed them in his artwork. Vincent Van Gogh portrayed one smoking a cigarette. One of these opens a curtain in the painting I'm Glad I Came Back by George (*) Grosz, and a self portrait by Munch gives him this type of arm. For 10 points, name these objects, one of which plays a violin in an Arnold Böcklin self portrait and which often personify death in art.
Hans Sebald Beham depicted one of these objects between Adam and Eve in one engraving and Jose Guadalupe Posada often displayed them in his artwork.
{skeletons}