What do do with an outside window on inside

could you please post a couple of photos?

What is the roof of the sunroom made of?

I'm really not sure what you're asking? Are you asking for ideas to do with the window? It sounds like you want to keep the light coming in? I guess I would say that you could remove the window and put in on that is just solid glass. Put up some window coverings that you like so that you can close it when you don't want the open look. I hope that's what you were asking. If not repost your question with what you want to do and post a few pictures too.

If the window looked good before it should still look good. Is there something wrong with the window that makes it not match the rest of your windows? You did not mention where you live, but where I am I would not want to heat this sunroom in January, so being able to close the rest of the house from the sunroom would be desirable.You also mentioned that you want to keep the natural light that still comes in through the sunroom to the den. If you cover the window in any way this light will be reduced. Not a good thing.

Need a photo to understand the problem.

Remove a section of the porch windows and install French doors or remove all of the porch windows opening up the space so that it just flows from room to room.

If you look down through these pics you will see a few that show the backside of the house. The windows into the house look great. Just keep your window sparkling clean and put a cute little lamp by it to shine into the den.

https://www.google.com/search?hl=en&tbm=isch&source=hp&biw=1057&bih=748&ei=GyzvWoChC5SgjwStpLWQCQ&q=inside+looking+at+sunroom&oq=inside+looking+at+sunroom&gs_l=img.3...3247.10272.0.10644.26.26.0.0.0.0.163.1803.23j2.25.0....0...1.1.64.img..1.15.1065.0..0j35i39k1j0i30k1j0i5i30k1j0i8i30k1.0.BduAc_ksc0E

I think you meant what to do with existing window. I have the same problem. Can’t seem to get my husband interested in removing the window. ???? Ideas??