If I could find a small vintage window I liked, I would enlarge one of the sunrise or sunset pictures I have & put it behind the glass
Tutorial: How to Hang an Antique or Vintage Window for Wall Display http://www.11magnolialane.com/2013/08/26/tutorial-how-to-hang-an-antique-or-vintage-window-for-wall-display/
DIY antique window picture frame with instructions on how to stick the pictures to the glass!
DIY - turning an old paned window, into a multi-picture frame.
Antique Window Pane Mirror with a shelf - could easily make this, either with glass, mirror, or as a picture frame
Salvaged Antique Window Frame with Crosses Placed by JustMeandMom, $70.00
31x32" Antique Window Picture Frame on Etsy Love this and the bow. Might want to incorporate this into the wall. Also, would be good to find some metal scroll work or diffent "relief" type stuff
Bein' Crafty :)
Old window frame decor
Antique Window Ideas - Yahoo Image Search Results
Window Display Ideas