Below are pictures of what I'd call a large round stained glass window that I came up with to be used in the chapel of a castle MOC that I'm working on. As I haven't seen anyone else post a model with a round stained glass window like this, I'd figure I'd show you guys what I came up. As with everything else I post, please feel free to steal, use, and abuse my design and make it your own!
Finished Product:

Two pictures illustrating the structure and size of it all:


I alternated colors and added blocks to the outside to help guide anyone through the building process.