So this living room has a window oddly place in a interior wall. It looks out into what was once a Carport but now a closed in Garage. The Garage is set to be converted into a Bedroom, so this window needs to be dealt with.

I was thinking of converting it into an in-set shelf.

Alternatively, it might be better to just close it in completely for a blank wall, since the other walls (that aren't visible) are not suited for putting a TV or anything.

The underlining problem is the marble window sill under it.

I have absolutely no experience in making this choice but I can imagine this Sill going to be an issue for either option.

But I'd like to get some other input on it.