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Me0KV TIL about Zakynthos, a Greek island that hid it's Jewish residents who otherwise would have went to Auschwitz. It is Europe's only complete surviving Jewish community during the Holocaust.
WkL0A TIL of Bishop Chrysostomos of Zakynthos and Mayor Karres, who, when ordered to list and turn in the entire Jewish population of Zakynthos, Greece, promptly hid them in various rural islands and turned in a list containing only their own names. The entire Jewish population survived.