UFOs in Art

I would like to start off with something that I find to one of the most fascinating things that points to the existence of aliens - unidentified flying objects in art from different times and different places. Because you can't argue with that, saying it's photoshoped or fake. It's there.

You can see one of these here in the blog, which is called "The Baptism of Christ" and is painted in 1710 by Aert De Gelder.
You can see more art featuring UFO's here: http://www.in5d.com/ufos-in-art-history.html
I really like that page (there's a lot out there!)and I really recommend you to read though and look at the paintings!

I feel like I should explain myself a bit too. Because it might seem like I am a alien obsessed believer that thinks they have always been here and are watching us and blabla. But I'm not. I'm just trying to watch all angles, not denying hypotheses.
And when I look at these paintings I feel like this is a great source. Because I don't think people came up with this, just because, like "Oh, I will draw this weird symbol in the sky, just because it looks cool!" No, I think people drew what they saw and didn't understand. Some of these object looks more like clouds or religious symbols for example, but that might be because that was the only way they could comprehend it.
Think about it.