Her parents were persuaded to let their daughter move to Grünewald where she lived at a boarding school and studied dance with Isadora Duncan.

[2] Maria-Theresa became part of the dance troupe Les Isadorables.

[2] In the early 1920s Duncan married an art dealer, Stefan Bourgeois, with whom she had two children.

[1] Edward Steichen used Maria-Theresa Duncan as a subject of photographs, notably The Arms of Maria Theresa Against the Background of the Erectheum[6] and Wind Fire.

[7] Duncan taught and danced throughout the 1950s when she performed the Festival Cycle.