Bust of Karl Marx, Chemnitz, Germany. The Karl Marx Monument (German: Karl-Marx-Monument) is a 7.10m-tall stylized head of Karl Marx in Chemnitz, Germany. The heavy-duty sculpture, together with the base platform, stand over 13 meters tall and weights approximately 40 tons. On a wall behind the monument, the phrase "Workers of the world, unite!" (from the Communist Manifesto) is written in four languages: German, English, French and Russian.