I braved the cold and snow to go outside and measure over from the current back door to the edge of the old door opening. Forty-one inches. Then I came back inside, stomped the snow off my boots, and measured the inside wall. Then I called Mare.
Me: Hey, we're not gonna be able to move that back door to where it originally was after all.
Mare: Why not? It wouldn't be that hard. You've got the doors, I've got a saw.
Me: Yeah, but where the door originally was is now my bathroom. The door opening would be directly across from the shower.
Mare: Well now...that'd be an interesting feature, wouldn't it?