The nice thing abouth old churches is that not one window is the same.
Abouth the glass. In those days people wasn`t able to manufactured large flat glass. Even not clear glass. So the glass window was bult up by small pieces. How did they made flat glass. Glassblowers blow a bottle(cilinder) cut of the bothem and top . Then they cut open the cilinder and flatten the glass. Old glass has bumbs and bubbles is small and is not transparent
What an interesting window and I like the history that goes with it. The texture of the bricks and the random pattern of the brick is interesting as well.