What is needed 2 round prong or 3 round prong in Venice, IT?
2 pin round is universal throughout europe.
Just like in the US the 3rd prong is a ground.
Mostly 2-pin round 250VAC 50hertz in Italy. Your 3-pin U.S. plug will not fit. CLICK HERE to see the electrical outlets worldwide.
Two hints: 1) the item or device that you wish to plug in will need to say 110V-250V 50-60Hz. If it is 110V only, you will need a power converter as well. 2) You can easily go online and buy a "universal" adapter kit that will work in most places in the world. About $15-$20. About $25 if you buy at the airport.