A who worked on the film told me it was "the main door". He did not told me what was outside, but i will ask...
And by the way, it's a real door too in the studio sceneryes too :)
The mural? Some have come to that conclusion yes. :)
Ty for sharing!
The door theory was broached here a few pages in:[url=http://www.prometheus-movie.com/community/forums/topic/7545]The Deacon (Proto Xeno?) was shown to us right from the beginning of the movie[/url]
