Gustav Holst: The Planets, Jupiter (excerpt) 2.9 Mb
This little snippet is the Andante Maestoso from Jupiter done up in GPO. Jupiter is an A-B-A form, with this being the slower, middle section. I call it "Jupiter's Hymn", because it sounds hymn-like to me.
This melody is interesting, as it is one of the few that I can thnk of that constantly climbs like this, i.e., each iteration raises the pitch level another octave. Try singing along and see what happens!
If you haven't heard The Planets, you may still find the melody familiar. That's probably because it is often substituted in movie trailers for the soundtrack while post production is still underway. Apparently, at least part of the "Hollywood sound" consists of six horns and the top four string sections all playing the melody in unison as in this example.