Fokker V.8
The Fokker V.8 was five-winged fighter designed for the Imperial German Air Service in World War One. Following the success of the Fokker Dr. I triplane, Fokker reasoned that five wings would be even better. The fighter was designed with three wings at the front of the fuselage and a further two behind the cockpit.
Fokker himself took the quintuplane on two brief flights after which the project was abandoned.