
Cave painting from Tanzania. Estimated to be up to 29,000 years old. This picture is located in Itolo and depicts several disc shaped objects.

Wandjina petroglyphs from Kimberley, Australia.
About 5,000 years old and may represent alien beings.

Illustration depicting a sighting of a burning wheel in the year 900 over Japan.

This is a tapestry called
Summer's Triumph It was created in Bruges in 1538 and presently resides at the Bayerisches National Museum. You can clearly see several disc shaped objects in the top of the tapestry.