The exhibition Five Friends: John Cage, Merce Cunningham, Jasper Johns, Robert Rauschenberg, Cy Twombly at Museum Ludwig tells the story of an influential yet often overlooked network of five prominent artists. While each of these artists has received considerable recognition, their friendship and the strongly influential relationships, both artistic and romantic, between them have gone largely unexamined. Photo: Historisches Archiv der Stadt Köln mit Rheinischem Bildarchiv, Marc Weber.