Ballet is a type of dance. It is only done by dancers who have had special training. The dancers are employed by a dance company, and they perform in theatres. The first reference to ballet is found in a work of Domenico da Piacenza, who lived in the early 14th century.
Ballet involves the creation of the dance itself, often a type of imaginary story. The story is told with the help of dance and mime. Ballet is a form of expression. It presents a story in a new form to the audience. The creation of a dance is called choreography. The choreography is learnt by the dancers under the supervision of a trainer, called a ballet master or mistress. Ballet is always performed to music, and in many cases the music was specially composed for a particular ballet. Ballet is a major part of theatre, and a popular example is The Nutcracker.