The main Italian invation is pizza ( Eventually the idea of flat bread found its way to Italy where, in the 18th century, the flat breads called "Pizzas", were sold on the streets and in the markets. They were not topped with anything but were enjoyed au naturel. Since they were relatively cheap to make, were tasty and filling, they were sold to the poor all over Naples by street vendors).
There are no people in the world who didn't know this delicious.
Also Italy is famous for its buildings and anthic style.
Alexander Volta had invented a battery. One of its elements was frog legs.
Italian people have a great traditions of doing vine.
Eros Zachertinno had invented a binocolours.
Italian inventor Guetos Pabilos had invented neon lights.
Italian phisics had invented gravity camera.