This picture is from the 1660 era. It depicts a sighting by two Dutch ships in the North Sea of an object moving slowly in the sky. It appeared to be made of two disks of different sizes. The source for this account is in the books entitled :"Theatrum Orbis Terrarum" by Admiral Blaeu. These books were compilations of articles by different authors and consisted of detailed accounts of long engagements at sea, cartography information etc.
This cave painting on the left is from c.10,000 BC and is from Val Camonica, Italy. It appears to be depicting two beings in protective suits holding strange implements. And the other picture is from the old cave drawings in Japan who depicts a man which resembles NASA's astronauts of today, doesnt it?
This picture represents The image which came from the french book "Le Livre Des Bonnes Moeurs" by Jacques Legrand. This book is still present in Condé's Museum ref 1338 ,297 part 15 B 8. Some people say that the sphere is a balloon but there was no balloon in france in 1338.
This image c.6000 BC from Tassili, Sahara Desert, North Africa. It does not look human does he ? Also notice there is a disk hovering in the background. Images like these of the ancient aliens have often appeared in the caves of Sahara Desert.
This artwork is from the buddhist Dharamsala temple in India. This is where the Dalai Lama lives on occasions. You can see the six silvery objects hovering in the background of this picture.
This is an old Chinese illustration from a fictional book entitled "Illustrated Survey of Weird Countries" (c.1400 A.D.) and had the following original caption: "Ji Gung Land: The people could make flying cars that travelled far with a suitable wind. In Tarng's day (c.1700 B.C.), Ji Gung people flying a car on a westerley reached Yew Jo. Tarang dismantled their car so it could not be demonstrated to the people ... Later an east wind came on which he had them fly the car back to their own country [5,000 km] west pf our gateway."