This image is taken from http://www.1adventure.com/archives/cat_travel.html – which seems to be some sort of travel blog.
Well, funny story about this photo: I found this while around for cathedral photos to get ideas for the lighting lab project. The light is very intense at its source in the center. It travels a great distance and fills a lot of space. It is so intense at its source that we can’t see the full length of the room. That is some powerful lighting.