Church/Choir music-type people - picture for Elgar concert poster?

[MrsBadger]

Somehow I've ended up with the job of finding the pictures for our concert posters and am completely stuck on the next one, which is Elgar's The Kingdom.
Fo those who don't know it (I didn't) it's an oratorio that covers a chunk of Acts, inc Pentecost, healing the sick, the disciples hanging out etc and finishes with a huge Lord's Prayer
What on earth kind of image can link the title (so people who just glance at the poster don't get too confused) and the content?

I'm fine when they're obvious things - crucifixion woodcut for St John Passion, Russian icon-type angel for Rachmaninov Vespers etc - but this one has me stumped!

Any ideas gratefully received

You could focus on the Pentecost theme - I think a big chunk of it focuses on the coming of the Spirit - lots of flames, wind etc

this is quite nice

Thanks for the ideas - sought some choir opinions too, and the Pentecost pic (though fantastic) was thought to run the risk of 'scaring off non-religious people'.
As we're a secular choir singing in a secular hall, I conceded the point, and am now pursuing a kingdom of heaven/New Jerusalem type image, possibly something Blake-y to tie in with the Englishness of Elgar...