Oedipus Rex and that deal with the story of Oedipus, "Oedipus Rex" was the second to be written. However, in terms of the chronology of events that the plays describe, it comes first, followed by "Oedipus at Colonus" and then "Antigone". Prior to the start of "Oedipus Rex", Oedipus has become the king of Thebes while unwittingly fulfilling a prophecy that he would kill his father, Laius (the previous king), and marry his mother, Jocasta (whom Oedipus took as his queen after solving the riddle of the Sphinx). The action of Sophocles' play concerns Oedipus' search for the murderer of Laius in
Atrax (mythology) kill Hebrus, who threw himself into the river Rhombus, which was subsequently renamed Hebrus. Atrax (mythology) In Greek mythology, Atrax () was the son of the river god Peneus and Bura. He was believed to have been the founder and eponym of Atrax or Atracia, a city in ancient Thessaly. He had three daughters: Hippodamia (wife of Pirithous); Caenis, who transformed into a male, Caeneus; and Damasippe, who was married to Cassandrus of Thrace and fell in love with her stepson Hebrus (Cassandrus' son by his first wife Crotonice); as he rejected all her advances, she took revenge on him