This is the Chalk Cliffs on Ruegen by Kaspar David Friedrich, which Routledge was good enough to put on the cover of Nietzsche and the Origin of Virtue. I chose this painting because, with its depiction of a man and woman staring into a dizzying vortex, it embodies an important Nietzschean theme: the fear of chaos. My favorite Friedrich painting, though, is the eerily tranquil Large Enclosure by Dresden.