Hmmm....it's not sounding good, is it? As for the photo I posted of the lightbox niche, that was just to give a general idea. I don't care if my "niche" is only inset 1" on either side...I'm basically just trying to avoid bricking up the outside, or installing another window. I will if I have to, but given what ddawg16 and dwillems posted, I'm still hoping this can be pulled off. I'd even be ok with having the wall on the dining room side patched up to be flush with the wall on either side of the existing window. I just figured some sort of inset, no matter how shallow, would give it some interest - even if it was only used as a place to display a wall hanging or something. I'll keep playing around with ideas for another week or two, so if anyone else has any thoughts, please feel free to offer them. And thanks to everyone who has offered suggestions - I appreciate it!