How to hide an (ugly) thermostat

The (Ugly) Thermostat is the 2nd picture from top on right side.

This was one of those projects that sprang to life on its own.  I wanted a picture wall in our last flat to showcase framed B&W family photos, childhood art, etc.  Unfortunately, I didn't know how to address the thermostat.  It took up such valuable picture-hanging real estate.  Even worse, since we were renting, there was no chance of moving/removing/changing it.

When I started building the photo arrangement, I initially ignored the bulging fixture.  I thought I could disguise it by placing frames in the vicinity of it.  Around the time I couldn't ignore the Ugly anymore, a perfectly sized, square frame was empty on my floor.  It screamed to be put up!  By chance I tried it, popping out the glass.  I loved the result.  Oddly enough, it made a great conversation piece.  I was almost always asked, "that's so creative.  How did you think of that?"  Oh how I wish I could take all the credit.