Thank you! That was precisely the idea: our house has an air conditioner installed in the dining room between the two window, and based on other two-family houses in the neighborhood I know there used to be a window there. This is a plausible replica of what the original window might have looked like -- well, the leadwork, at least; the coloring is my own design, and of course its quilt nature is to insulate the air conditioner for winter.