Hartmannswillerkopf, also known as the Vieil Armand (French) or Hartmannsweiler Kopf (German; English: Hartmansweiler Head) is a pyramidal rocky spur in the Vosges mountains of the Grand Est region, France. The peak stands at overlooking the Rhine valley. At Hartmannswillerkopf stands a national monument of World War I for the fighting which took place in the trenches here.