What you're seeing is a flat rendered wall. The LG split unit is real and is sitting on the real pavement, flat against the wall. Everything else is painted. There's no step, no pillar and certainly no coffee pot.
There's also no signature. I wonder if it might have been painted by Muriel Terzano Lamy? The style and quirkiness is not dissimilar. I suppose we'll never know,
Soon, of course, there will be no wall either as everything old and lo-rise will inevitably be swept away, for the bright new city of 2022.