My geological engineer/exploration geologist daughter Évelyne works to collect and analyse core samples in Kiruna, Sweden. Here is one of the core samples, marked "666", the Number of the Beast.
Coincidentally, this graffiti of a beast was found on a bridge in Gatineau, QC, Canada.
Even the odometer on Évelyne's bicycle which she uses to commute to her workplace shows "666", the Number of the Beast.