Stain Glass Hall

Two years ago, my wife and I went to Italy for a backpacking trip. We visited 3 main cities - Rome, Florence and Venice. A lot of the buildings there were very old but beautiful, and historical. I was especially amazed at the churches where they had huge stained-glass windows that created fantastic ambience inside the hall.
So, here's an attempt to paint out what I felt visually, though in a completely fictional building.