On September 8, 1915, a German Zeppelin commanded by Heinrich Mathy, one of the great airship commanders of World War I, hits Aldersgate in central London, killing 22 people and causing £500,000 worth of damage.
The Zeppelin, a motor-driven rigid airship, was developed by German inventor Ferdinand Graf von Zeppelin in 1900. Although a French inventor had built a power-driven airship several decades before, the von Zeppelin-designed rigid dirigible, with its steel framework, was by far the largest airship ever constructed. However, in the case of the zeppelin, size was exchanged for safety, as the heavy steel-framed airships were vulnerable to explosion because they had to be lifted by highly flammable hydrogen gas instead of non-flammable helium gas.