I watched Nausicaä of the Valley of the Wind recently, and I was really struck by the beginning of this piece:
In the movie it's rendered instrumentally; it is well-described on Cue by Cue as 'Orchestral, regal, resolute string rhythm with melody on winds'; I haven't been able to find a full orchestral version online but there is a meaningful excerpt here at the 6:44 mark. (Spoilers for the movie on both links.)
Now, I could swear that I've heard similar progressions somewhere in the classical canon, but I've not been able to identify it. The composition is obviously new, but I have the strong impression that parts of the pieces it brings together are adaptations of existing music. Can anyone point me in the right direction if this is the case?