UFOs IN ANCIENT ART

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~ “The Baptism of Christ” ~ 
Fitzwilliam Musuem, Cambridge, England 
Painted in 1710 by Flemish artist Aert De Gelder 
depicts a classic, hovering, silvery, saucer shaped UFO 
shining beams of light down on John the Baptist and Jesus. 
What could have inspired the artist to combine these two subjects?
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“The Crucifixion” hangs above the altar at the Visoki Decani Monestary in Kosovo, Yugoslavia ~ it was painted in 1350. 
On either side of Jesus are a pair of Jetsons like skycars, one chasing the other ~ the pilots apparently working controls. 
The leading craft is decorated with two twinkling stars, one reminiscent of national insignia on modern aircraft 
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Could there possibly have been sightings of UFOs like these, single pilot craft, in medieval Yugoslavia? 
Did people of the time merely imagine the inside and…SEE LINK–http://alien-ufo-community.ning.com/forum/topics/ufos-in-ancient-art?xg_source=activity