Here is a Dutch short film from 1929 entitled Regen, or "Rain." It was directed by Joris Ivens and runs about 14 minutes.
A friend told me of it and I found the entire piece on Youtube... I fell quite in love with it. It is the simplicity of rain falling on a Dutch city, filmed in an infinitely gentle way. I really do like the music, although it is quite clear that this isn't the original music from the film, which was supposedly composed by Lou Lichtveld.