In 2015 I obtained a visa to study in Italy from January-April. I also obtained a permit to stay while in Italy. I left Italy within my visa period and returned to the US in April 2015. My passport is stamped with my exit from Italy and my re-entry into the US.
I am now returning to Italy for vacation in October. I will be staying 8 days. Is there any documentation besides my passport I need to bring with me since I previously lived in Italy on a visa?