The Leonardo hidden from Hitler in case it gave him magic powers

There is a myth in Turin that the gaze of Leonardo da Vinci in this self-portrait is so intense that those who observe it are imbued with great strength. Some say it was this magical power, not the cultural and economic value of the drawing, that led to it being secretly moved from Turin and taken to Rome during World War Two - heaven forbid it should ever fall into Hitler's hands and give him more power.