Its the "GIRO" de Italia (Tour of Italy) Dumke. That race, the Tour de France and the Vuelta a Espana (Tour of Spain) make up the grand tours in cycling.
In the spring there are several smaller (usually 3-9 days) tours and the 1 day classics. If you ever catch it on TV (or internet)the Paris-Roubaix race. It is a great spring classic and has many sections where they race over the old cobblestone roads.