In 1810, the oldest of all universities was founded in Berlin. Among its notable alumni, faculty and researchers are Karl Marx, Friedrich Engels, Max Weber, Georg Simmel, Otto von Bismarck, W. E. B. Du Bois, Angela Davis, Walter Benjamin, Karl Liebknecht, Arthur Schopenhauer, Georg Wilhelm Friedrich Hegel, Ernst Cassirer, Heinrich Heine, Albert Einstein, Max Planck.