Clotilde Margarete Anna Edle von der Planitz, known professionally as Clotilde von Derp, was a German expressionist dancer, an early exponent of modern dance. Her career was spent essentially dancing together with her husband Alexander Sakharoff with whom she enjoyed a long-lasting relationship.

Expressive dance from German Ausdruckstanz, is a form of artistic dance in which the individual and artistic presentation of feelings is an essential part. It emerged as a counter-movement to classical ballet at the beginning of the 20th century in Europe. Traditional ballet was perceived as austere, mechanical and tightly held in fixed and conventional forms. Other designations are modern dance and free dance, expressionist dance or new artistic dance, in Anglo-American countries German dance. In 2014, modern dance with the stylistic forms and mediation forms of rhythmic and expressive dance movements was included in the German List of intangible Cultural Heritage as defined by the UNESCO Convention for the Safeguarding of Intangible Cultural Heritage. German Expressionist dance is related to Tanztheater.