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. Looking for a way to get in shape, improve your flexibility and have fun? Ballet dancing might be the activity for you. Information on ballet history, classes and steps for kids.