Bronislava Nijinska was one of the most remarkable figures in the development of twentieth-century choreography. Nijinska’s work reflected a pioneering combination of classical ballet and choreographic innovation. She joined the Ballets Russes as a dancer in 1909 and was made a principal dancer the next year. Between 1921 and 1924, Nijinska was ballet mistress and chief choreographer for the Ballets Russes. During her tenure with the company she choreographed nine ballets and numerous operas for Diaghilev.