Not sure whether this is relevant to the discussion but in her book Apollo's Angels Jennifer Homans mentions that during the French Revolution many women wore a simple white tunic, symbolising the nation cleansed of corruption and greed, and representing purity and virtue. She goes on to say that in the popular festivals that took place celebrating the Revolution, white-clad women, sometimes wearing tricolor sashes, moved gracefully, not marring their beauty with speech. In the Festival of Reason a woman played the lead role, supported by girls in white. Thus, the origin of what became the corps de ballet; before the Revolution the corps generally comprised men and women dancing as couples.