 Giuseppe Occhialini received the Wolf Prize in Physics for the discovery of the pion or pi-meson decay in 1947.Ennio de Giorgi, a Wolf Prize in Mathematics recipient in 1990, solved Bernstein's problem about minimal surfaces and the 19th Hilbert problem on the regularity of solutions of Elliptic partial differential equations.Italy is the fifth most visited country in the world, with a total of 52.3 million international arrivals in 2016.