"Baa, Baa, Black Sheep" is a traditional English nursery rhyme, which is usually sung to the tune of a French song, Ah! vous dirai-je, maman. The rhyme was first published in Tommy Thumb's Pretty Song Book, with the lyrics very similar to those used in the modern version. It is a single stanza song and relatively easy for the little ones to master.
Various theories but without any supporting evidence have been advanced to explain the origin of the song. Some commentators believe that it is a complaint against taxes imposed on the Medieval English wool trade.