Women began to dance ballet in 1681, twenty years after King Louis XIV of France ordered the founding of the Académie Royale de Danse. At that time, the standard women's ballet shoe had heels. Mid-18th century dancer Marie Camargo of the Paris Opéra Ballet was the first to wear a non-heeled shoe, enabling her to perform leaps that would have been difficult, if not impossible, in the more conventional shoes of the age. After the French Revolution, heels were completely eliminated from standard ballet shoes. These flat-bottomed predecessors of the modern pointe shoe were secured to the feet by ribbons and incorporated pleats under the toes to enable dancers to leap, execute turns, and fully extend their feet.