It was in 1839 that the Cassa di Risparmio di Firenze took its name. It was quoted on the Milan Stock exchange until recently being incorporated into the Intesa San Paolo Bank. It's a good bank, but Google is making it's life a misery (or at least the system admin that is getting lots and lots of authentication requests from CR clients via san paolo bank).
Why on earth am I mentioning this?
Well, if you goto Google and type in "Cassa di Risparmio di Firenze" you can't find the website anyhwere in Google. Instead you get www.intesasanpaolo.com.
What you should get is this website: http://www.bancacrfirenze.it/ which looks the same as the other but it is in fact completely different for banking purposes.
Why is this happening?
Well it seems that both the intesasanpaolo.com and http://www.bancacrfirenze.it/ domains are pointing to the same website. I've done some URLS swapping across domains and they are both sharing the same content.
So consequently Google is making a mess of things. I can be you money that neither of the banks are in Webmaster Tools, so this is one of those errors that will go on for a while (it's been a week already). It's not Google's fault but it's nice to stick the knife in where you can.
Go on Google, fix it clever you.