Music: Does anyone know from who is originally the first few seconds of classic part of "Adagio" by Safri Duo?

I'M TALKING ABOUT THIS MUSIC:
http://www.youtube.com/watch?v=m2nYZSoIM...

http://www.youtube.com/watch?v=QADrAXVaq...

That Adagio? It's not classical, It's written as a classical part. It's just an introduction in classical manner (a couple of harmonic relations), but it's not a classical piece.

http://www.youtube.com/watch?v=m2nYZSoIM...
It's not a classical piece either. It's composed, maybe, for that movie.

It is not classical music ; just background music written for the clip.