Light at the End of the Church?

Another from this spectactular chruch and when i was walking around, now at the other end of the church, noticed that the amazing ceiling and how it lead neatly to this circle of light at the end of the ceiling, and how it illuminated the entire church. Furthermore i liked how i managed to take the picture with the light right in the middle of the picture and not at an angle as i thought that would not have had the same effect.