I work in this neighborhood

I work in this neighborhood.
Everyday I walk here and everyday I look around the piazza
in awe. It is really unique and amazingly beautiful. Tucked away in its own little corner it's like walking into a fairytale. Of course you have to be of noble heritage or a millionare to live here but at least I have the pleasure of visiting.
The fountain is designed by Gino Coppede (and I think the buildings as well?).






One thing I have noticed around this neighborhood is the presence of spiders on the buildings or gates of the buildings. I've only noticed it a few different places but I wonder what the significance of arachnids means.