The Paris Gun (German: Paris-Geschütz) was the name of an artillery piece with which the Germans bombared Paris during World War I. This oversized railway gun was used from March to August 1918. When it was used, Parisians believed they were being bombed by a new type of high altitude zeppelin, because neither the sound of an airplane nor of a gun could be heard. It was the largest piece of artillery used during the war, and is considered to be a supergun.