Christian associations The Last Supper by Leonardo da Vinci It was a bad, unlucky day.' This major event in Norse mythology caused the number 13 to be considered unlucky.
Dossey: 'Balder died, and the whole Earth got dark. The trickster god Loki, who was not invited, arrived as the 13th guest, and arranged for Höðr to shoot Balder with a mistletoe-tipped arrow. One source mentioned for the unlucky nature of the number '13' is a Norse myth about 12 gods having a dinner party in Valhalla.
