Milan Holocaust Memorial Foundation

The Memoriale della Shoah is a Holocaust memorial at the Milano Centrale railway station commemorating the Jewish prisoners deported from there during the Holocaust in Italy. Jewish prisoners from the San Vittore Prison, Milan, were taken from there to a secret underground platform, Platform 21, to be loaded on freight cars and taken on Holocaust trains to extermination camps, either directly or via other transit camps. Twenty trains and up to 1,200 Jewish prisoners left Milan in this fashion to be murdered, predominantly at Auschwitz.

Source: Wikipedia