Our tract of houses had same problem years ago, my house they forgot to put the glass in, but neighbors solved it by putting plywood or colored plastic that came in pretty designs at the time. It helped that the window was actually in the front closet(so clothes could fade?) only mistake the builder made tho & since he built a quality home on his own his father let him take over the business. Went on to built some of finest homes in L.A. But your window is in a very open place so wonder if you could get a fancy steel mesh or scrollwork that has mesh behind it. Custom shop can do what you want. We got bars for our windows & discovered same thing, break window & pull the chain & get in easily so we went to wrought iron or iron works & had a mesh welded on side that the locking part was on so couldn't get to it. Otherwise might find a thin steel decorative piece about 5- 6 ft high by width 12-15 in. that could be screwed inside in 1 piece maybe in same color as locks. A couple of neighbors put an enclosure of wrought ironwork so they could keep outside iron door locked. Looking like you have a rectangle space just outside the door with house forming 2 sides so just use wrought iron to join the house . I think a decorative piece inside would look nicer, not impossible to break through to. DD just got a new lock with a combination, she likes that & less keys to carry around. I'd go with steel piece screwed in & then put a large object, potted tall plant or something outside so most folks wouldn't notice anything. The fancy steel mesh has little holes in it so would let in some light . Maybe someone else has a better idea.

I don't know that the combination lock would be any better if it's like yours on back, I haven's seen hers yet. I don't want a lock that has to have a key to get out, in fire they would be trapped. I have 1 like that between kitchen & garage but key is always in it until I leave.

Window film ...

https://www.amazon.com/Security-Window-Film-Mil-Roll/dp/B004XHDD64

In addition to @lazy_gardens' security film idea, put a home security monitoring sticker on a window or staked in yard at entrance.

+1 on window film. We applied it to all door windows. We don't need anything this good (3M sells different levels of film), but it gives you an idea of how it works. As a side benefit, our stuff is translucent so we get the light but don't end up showing off rooms to passersby.

If you feel the need for yet another layer of security buy some shoes. LOL, Let me explain. Many college athletes have enormous feet. Contact student services about buying some worn out shoes. The student will be tickled for the extra cash and a pair of size 16 sneakers parked next to the door should make burglars think twice about busting a window. If you can afford to spend $10K,you can really scare the bejeebers out of them with a pair of Shaq O Neal's size 22 discards.

klem1--- Cool idea! steve-o Didn't know about the film, that sounds great too, will pass it along to friends!

Good point, rwiegand. But there's nothing wrong with making it very difficult for the casual joyrider burglar. And even the competent ones don't want to make their own lives too difficult. If a house is resistant to getting in, they just as likely will move on to another one that's easier to enter.

There are several other things one can do at little cost and effort to make burglars think twice about taking on a home. klem's idea about large shoes is one (though, obviously, if everyone did that it wouldn't be a deterrent). Alarm stickers on doors (for recognized companies), better handlesets and deadbolts, obscuring views to the inside, not leaving "expensive" trash or recycling (like the box for that new HDTV) visible to whoever drives by, ...

A competent thief can get into a house very quickly. You just want to do the smart things which will make him/her think twice about getting into your house.

" if everyone did that it wouldn't be a deterrent)"

Good point steve,that's why I put a few strands of hair and drops of ketchup on those by my door. (:

Years ago somebody kicked in every door on folks block, 6 houses, didn't get in their house as they had 2 locks & chain on it but damaged the bottom & they went & got a steel door. Looked almost like the other door but was stronger. Wood doors were put in by builder & apparently not best quality.