A Zeppelin airship is a type of rigid airship that uses a framework to hold gas-filled compartments, allowing it to float. Named after the German inventor Ferdinand von Zeppelin, these airships were first developed in the early 20th century and became popular for passenger travel and military reconnaissance. Zeppelins are filled with lighter-than-air gases, such as hydrogen or helium, which provide lift. They were known for their long-range capabilities and ability to travel slowly, making them suitable for sightseeing. However, their use declined after several high-profile accidents, including the infamous Hindenburg disaster in 1937.