Iris Müller-Westermann is an art historian whose doctoral thesis is on Edvard Munch. After working for years as a curator at the Munch-museet and head of the Stenersen Museum in Oslo, she became curator of international art at the Moderna Museet in Stockholm in 1998. Her publications focus on twentieth-century art and include studies on Munch as well as art of the twentieth and twenty-first centuries in conjunction with exhibitions she has organized, among them After the Wall: Art and Culture in Post-Communist Europe (1999), In the Power of Painting (2000) and Rosemarie Trockel (2001). She recently published Edvard Munch: Die Selbstbildnisse (2005).
Werner Spies is an art historian and publicist. He was professor at the Düsseldorf Art Academy from 1975 to 2000 and director of the Centre Georges Pompidou—Musée national d'art moderne in Paris from 1997 to 2000. Aside from numerous publications and international exhibitions, he edited the catalogues raisonnés of Max Ernst’s oeuvre and Pablo Picasso’s sculptures. He has received diverse honors and held many offices; among others, he is chairman of the board of trustees of the Max Ernst Museum in Brühl and head of the Max Ernst Research Site at the Deutschen Forums für Kunstgeschichte in Paris.