Elke Oberthaler is Head of Painting Conservation at the Kunsthistorisches Museum, Vienna. Sabine Pénot is Curator of Netherlandish and Dutch Paintings at the Kunsthistorisches Museum, Vienna. Manfred Sellink is the Director of the Royal Museum of Fine Arts, Antwerp. He is a world-renowned scholar of Netherlandish painting and Bruegel in particular. Sellink is the author of Bruegel : The Complete Paintings, Drawings and Prints.
Ron Spronk is Professor of Art History at Queen's University in Kingston, Ontario and at Radboud University in Nijmegen. Alice Hoppe-Harnoncourt is an art historian based in Vienna. She specializes in the technical investigation of paintings, and in conservation and collection history.