"Ring a Ring o' Roses" or "Ring Around the Rosie" is a nursery rhyme or folksong and playground singing game. It first appeared in print in 1881, but it is reported that a version was already being sung to the current tune in the 1790s and similar rhymes are known from across Europe. Urban legend says the song originally described the plague, but folklorists reject this idea.
Right and right! I'm a music teacher and it is an interesting theory and story. I do like that the rhyme goes back so far - and I love that given a chance - children still love to play the game. Fav for a beautiful picture and correct information.