Po (river) 70,000 in Italy, of which 41,000 is in montane environments and 29,000 on the plain. The Po is the longest river in Italy; at its widest point its width is . The Po extends along the 45th parallel north. The river flows through many important Italian cities, including Turin (Torino), Piacenza and Ferrara. It is connected to Milan through a net of channels called "navigli", which Leonardo da Vinci helped design. Near the end of its course, it creates a wide delta (with hundreds of small channels and five main ones, called "Po di Maestra", "Po della Pila", "Po delle
The Holocaust in Italy history at the Ca' Foscari University of Venice, titled "The Italian Executioners: The Genocide of the Jews of Italy" examined the role of Italians in the genocide and found half of the Italian Jews killed in the Holocaust were arrested by Italians and not Germans. Many of these arrests could only be carried out because of tip-offs by civilians. Sullam argued that Italy ignored what he called its "era of the executioner", rehabilitated Italian participants in the Holocaust through a 1946 amnesty, and continued to focus on its role as saviours of the Jews rather than to reflect on the