An article I was reading about the tensions between Ukraine and Russia showed a photo of what was labeled a "tank", and I swear it was a German StuG III. From, like, WWII. In the photo, it was positioned behind a pile of dirt and rock and covered in camo, so it was hard to see, but I'm a big nerd and can see these things (at first, I just thought, "huh, weird, I didn't know anybody was using casemate TDs anymore. I wonder what it is?", and then I looked at it more closely and "hey, wait a second..."). Sadly, I can't find the picture now.
I see 3 possibilities, most-to-least likely:
1. The author and/or art person working for a newspaper's website wouldn't know the difference between a Panzer IV and an OGRE, and just grabbed some stock art that was labeled "tank." (I mean, technically, a StuG III isn't even a tank, it's an assault gun or a tank destroyer, but that's probably deeper into the weeds than most people need to go.)
2. Ukraine is using a casemate mobile gun from, I dunno, decades ago, that was developed off of the German WWII designs, and which, under heavy camo, was hard to distinguish from an honest-to-gosh StuG III. Like, old but not
that old.
3. Ukraine is using an honest-to-gosh StuG III, probably outfitted with some modern equipment, as a self-propelled, functionally-unarmored, anti-tank gun. I don't know what it would take to refit a modern AT gun onto an old chassis. I don't why you'd bother, unless a StuG III can actually fire modern AT rounds without a lot of refitting.
Obviously, #1 is the most likely (the fact that I can't find the picture now could mean that someone spotted the error and removed it), but that's also the most boring. Is it possible some of the smaller armies in Europe are still using casemate TDs?
Here's a picture of a restored StuG III, I assume at a museum. The one I saw in the article didn't have the side panels, but the driver's viewport and the commander's cupola were identical. I also have a pic of a StuG IV below. It wasn't a IV in the pic I saw, because it didn't have the big box where the driver's viewport is on the III.