The Paris Gun of 1918
A technological marvel, it was also a super-weapon of terror. The Kaiser Cannon of 1918 terrorized Paris during Germany's last desperate campaign to win World War I. The Paris Gun was a marvel of technology. It required astronomers, geographers, physicists, chemists, and other scientific experts to launch each 210-pound shot at Paris from behind German lines--a range of 80 miles (130 km).