Composition, sure but a picture of that light! I bet it'd look great as a darkroom print, and a lot of fun to get the highlights and shadows just right.
Thanks all! I wish I'd had time to use some movements and try to adjust for the perspective, but the light was fading and the nuns were menacing.
Working on a larger print tonight so I'll have a try at fine-tuning the contrast and tweaking some of the highlights.