Very usually lighting. Such vivid colors. The beams of light coming from the celling is great. The reddish walls really give it an interesting mood. Contrasts really gives the walls some excellent shadows. At first I gave it a "6" and increased the score to "9" after looking through all the entries.
Very special atmosphere. The big bright spot is a bit disturbing, I would crop the image just below it, since the big bright spot and the area above it does not add much to the picture. If you crop away a bit from the sides as well, you still can maintain the impression of height in the image.
Love the contrast between the darker interior and the bright sunlight streaming in. The sun beams going through the dust directs your eye both upward and downward. Unfortunately the blown out spot in the center of the skylights is really distracting IMHO!
TC
Wow, this looks like a multiple image (superimposed), which I know is absolutely possible and legal using a digital camera. I like each image individually, but I'm not sure they go together very well as a composition. Of course I'll probably be eating crow because I'll find out this wasn't a superimposition type image.
Either way, I like the church/cathedral part of the image the best.