The Paris Gun was a long-range artillery piece used by the German military during World War I. It was designed to bombard the city of Paris from a distance of about 120 kilometers (75 miles). The gun was capable of firing shells that could reach the city, causing significant psychological impact and destruction. Developed by the German engineer Gustav Krupp, the Paris Gun was notable for its size and range. It was one of the largest artillery pieces ever used in warfare, with a barrel length of over 34 meters (112 feet). Despite its impressive capabilities, the gun was eventually rendered ineffective due to counter-battery fire and the changing dynamics of the war.