Evidence? Yes! It's all over the place.
"Place of Sighting: C 14 Flight School at the Prag-Gbell aerodrome. Date of Event: August/September 1943, supposedly on a Sunday (I seem to recall there were no services on that day. The weather was good, dry and sunny. Kind of Observation: "I was with my flight comrades on the air strip, more precisely, near the school buildings, some 2000 meters away from the arsenal (located to the extreme left). See adjoining diagram.The device was inside the hangar: a disk some 5-6 meters in diameter. Its body is relatively large at the center. Underneath, it has four tall, thin legs. Color: Aluminum. Height: Almost as tall as a man. Thickness: some 30 - 40 cm., with an rim of external rods, perhaps square orifices. The upper part of the body (almost a third of the total height) was shrunken over the upper half of the disk. It was flat and rounded. See the attached sketch for the lower half.
Nazi Flying Saucers