I have a power of atterney signed and notorized from my mom. Is this enough to be useful in Italy or do I need other papers signed?

I would ask an elder attorney about this. It's likely you will need more papers for another country, however I don't know. A POA may be sufficient in some countries. To be safe, you should check with an attorney.
Good luck,
Carol

You can also check with the consulate in D.C.

Italy are you serious, what you really need is me there to give you guidance :)