Oh look at the cute pink building in Baveno... ooooh, there's a cat sitting in one window and a pigeon in the other... But closer inspection of course reveals that neither cat or pigeon is real, in fact those two windows are completely fake, faux, painted onto the facade of the building. On this wall, of six windows, only two were real.
Faux painting is not at all uncommon in Italy; even our La Lombarda has one faux window painted on to even out a wall. Stones are painted on for effect, molding details, etc. Here, the faux effect is made more complete by the addition of the real stone window sills and the shutter holders on the wall. But the cat and bird are pure whimsy.
Take a good look around you at buildings; is everything you're seeing really there?