During the seventeenth century ballet was normally performed in the same productions as opera and was known as opera-ballet. Jean-Baptiste Lully set the standard in the opera-ballet, and his audiences came to see the dancing as much as the music. When André Campra suggested making the dance sequences longer as well as shortening the skirts of the female dancers, in his , L'Europe Galante, (1697), ballet became increasingly popular.
By 1735 when Jean-Philippe Rameau put on an opera-ballet called Les Indes Galantes, the dancers were definitely doing ballet, as the ballroom and ballet dance forms were now recognised as separate entities.
The turning out the legs which had been originally to display the buckles of shoes become much more important in ballet, although it was still desirable in ballroom dancing. Now, ballet requires almost flat turnout and in ballroom turnout is no longer necessary.
With the French revolution came a fashion revolution in ballet. Costumes were much lighter and women dancers wore light flowing dresses with a cut similar to the French Empire line, and both male and female dancers wore soft flexible footwear.