The work of Swiss artist Rémy Zaugg (Courgenay, 1943 – Basel, 2005), which stretches across four decades, is on display in the Palacio de Velázquez. The exhibition The Question of Perception is the outcome of a close collaboration between the Museo Reina Sofía and the Museum für Gegenwartkunst, Siegen, and looks over a body of work based on the study of perception, and the relationships between text and images, colour and language, the real and the subjective, and between plane and space.