The children's game "Ring Around the Rosey" and the words that accompany it ("Ring around the rowy, pocket full of posy, ashes, ashes, all fall down") derive from the medieval practice of scattering rose petals in a circle around one's bed ("ring around the rosy") and carrying small bouquets ("pocket full of posy") as protection against the aromas created by the disease and decay of the Black Plague ("all fall down").
