Knoller C.II was an Austro-Hungarian reconnaissance and bomber aircraft built during World War I. Production took place in three series of 25 pieces and the first was delivered to the Austro-Hungarian Air Force in September 1916. During a test flight in February 1917, the wings of the machine disintegrated and the crew died. This crash led to the cessation of production and further flying with the type. The aircraft produced were not included in combat units, most were used as aids for training ground personnel. Displayed aircraft is the only surviving specimen of this type.