• Cloud Tunnel, Luther Church Cologne 2008
  • Photo drawing on photopaper
  • Pastel chalk paper
  • Monotopy
  • Pastel chalk on paper
  • Nothing, State Museum Bonn, 2000
  • Pastel chalk on paper
  • Pencil on paperroll
  • Pastel chalk on paper
  • Oil chalk greaseproof paper
  • Oil crayon on paper