Where are the genuine UFOs in Art History?

I've read a great deal about UFO's in art history and found some very revealing items debunking many of the favorites like

www.ufo-articles.com... and
and
www.ufo-articles.com...

There are also images that have not been debunked like:

www.ufo-articles.com...

Does anyone have some good information or links about historic UFO sightings or encounters in art that have not been explained?

Patrick

Matthew Hurley's site is where you want to be looking...(does appear down at this very moment).

regards