On April 1, 1958, the Martha Graham Dance Company premiered the ballet, "Clytemnestra", based on the ancient Greek legend Clytemnestra and it became a huge success and great accomplishment for Graham. With a score by Egyptian-born composer Halim El-Dabh, this ballet was a large scale work and the only full-length work in Graham's career. Graham choreographed and danced the title role, spending almost the entire duration of the performance on the stage. The ballet was based on the Greek mythology of the same title and tells the story of Queen Clytemnestra who is married to King Agamemnon. Agamemnon sacrifices their daughter, Iphigenia, on a pyre, as an offering to the gods to assure fair winds to Troy, where the Trojan War rages. Upon Agamemnon's return after 10 years, Clytemnestra kills Agamemnon to avenge the murder of Iphigenia. Clytemnestra is then murdered by her son, Orestes, and the audience experiences Clytemnestra in the afterworld. This ballet was deemed a masterpiece of 20th-century American modernism and was so successful it had a limited engagement showing on Broadway.