Doing a window

I have been reading past posts and trying to decide what is the best way to complete this window. I am venturing out and making a huge window (for me). I have just done some samll projects in the past. Any help would be appreciated. I am not sure what the rebar support is. I will try to ask the glass shop that I go to but any help here would be appreciated. The window is a triangle (a palladium window) that will have its own glass and the stained glass window will go behind it. The window is triangle with measurements of the top sides 51 inches and the bottom at 92 inches. I plan on doing the project in lead figuring that would be more sturdy. After I finish the project (cutting to soldering) what would you suggest my next step be. You will be able to see the window from both sides. Thank you so much for any assistance you can give me. I am hoping that I am not to in over my head for this. Angie