The window is becoming a central motif, along with the frame, for my work at the moment.
Aside from the many forms of symbolism associated with images inside containment elements, there is a practical function. It allows layers to be built up in a new way for me. Once something is in a frame, even if that frame is really jst a two dimensional graphic element, there is a three dimensional shift in the image. Much like the old style layering of cells in animation but without the trick of motion.