Go to Thyssen-Bornemisza Museum to see the mini-exhibition Portrait of Hugo Erfurth: Techniques and Secrets. The occasion was a guided tour for the friends of the museum. The picture is part of the museum's permanent collection. The resoration department have made an in-depth study of it using state-of-the-art imaging and other techniques, and the exhibition brings it back together with the original preparatory drawings and photographs from collections in Germany, and a picture by Dürer similar to ones that might have influenced the artist in the 1920s. The exhibition continues until 18 May 2008.