MartavTaurus
Another vote from a Tchaikovsky ballet, this time Swan Lake.
More up to date would be a Ukrainian Prayer by John Rutter.
Greyduster the choir sang Parry's "I was glad" at our wedding. DH is a cathedral chorister and I nearly had to stop him leaving my side and going to join in!
I agree Swan Lake is one of my favourites, I recently listened to it in the car and had to pull over, even though I heard it so many times before it was like I was hearing it for the first time.
Where would we be on the Earth without music to speak to us of Heaven?