Does anyone know where to start looking for ancestors that came from italy?

Question:

Does anyone know where to start looking for ancestors that came from italy?

my grandmother is from italy, and dont know really where to start looking

Best Answer - Chosen by Asker: Depending in which year you might want to start with Ellis island. http://www.ellisisland.org/
Because most Europeans before the 1920 had to come through Ellis island.