Ballet is theatrical representation in dance form in which music also plays a major part in telling a story or conveying a mood. Some such form of entertainment existed in ancient Greece. ----. From there, it was taken by Caterina de' Medici in the 16th century to France in the form of a spectacle combining singing, dancing, and speech. During the 18th century, there were major developments in technique, and ballet gradually became divorced from opera, emerging as an art form in its own right.