This window is difficult to treat and I have seen many of them. They seem to be very popular in homes in the northeast. I guess the architect did not want to have a large vacant wall so adding additional windows very high lets more light in however this is tough to handle for window treatments. I have done this window and only treated the lower part of the window instead of trying to go for the arch of the window. If you are on a budget then treating the lower part is perfect. If you have a larger budget then a more glamorous treatment can be done maybe with long panels and swags but they need to be important enough to compete with this large scale window.