This is an amazing village in Poland,it looks like a faraway magic village in a magic kingdom.
Lucky though it is very real and you can visit it.
Although no one is completely sure how and when this tradition began, it dates from when the smoke from stoves escaped through little more than a hole in the ceiling of the house. Women would paint over the spots of soot with whitewash. Yet the spots would still be partially visible and it is believed that the women, in order for their house to appear immaculate for religious festivals, took to covering the remnants of soot stains with paintings of flowers. Once modern cooking and better ventilation came in to practice, these cover-ups were no longer necessary. Yet instead the flower patterns became gradually more and more sophisticated.
a lot more pictures and article at Kuriositas