A high window, one above eye level, is referred to as a "clerestory" window. They are designed to bring light, and sometimes ventilation, into a room without providing a view or compromising privacy.
Viktor has such a window on his x-house. I found a photo and added a helpful arrow to point it out.
We could add a window like this pretty easily. I talked to both Stefan and Willie; it's a straightforward matter of taking a chain saw to cut out a rectangle and fitting a simple non-opening window. It wouldn't impact the integrity of the house, although Sooz is leery of cutting any holes. I've added an exceedingly crude photo illustration of where such a window might go, complete with another yellow arrow.
It's a proper door window; triple-glazed and it weighs a ton! I'm holding it up in the photos to give an idea of where it might go.
Olle says putting it in the door is simple, and of course I trust him. Cutting a hole in the door instead of the house would be simpler, and wouldn't be a permanent change either.
One drawback of a door window is that it might reduce our privacy a bit. I could install a shade or curtain of some sort, but I'm not too sure how that might work.
Either way, it'll me a nice project to delve into later this year!