What is the song used in the Halo 3 believe ad?

[Patrick]

You know the one with the sculptures that's all over the place?
http://www.youtube.com/watch?v=3PGpn4c96ZU
there's a link, I really like that song, if you can help that'd be awesome, thanks

 

[ftransam88]

The music is Chopin's Raindrop Prelude Op. 28, No. 15

 

[Mike]

Chopin's Raindrop Prelude Op. 28, No. 15

 

[Mr. Poptart]

according to one of the commenters

"Chopin Op. 28 No. 15 Prelude "Raindrops""

 

[HOLLA]

choping raindrop