The Horatians and the Curiatians (Die Horatier und die Kuriatier) is a Lehrstück ("Schulstück" in the collected plays) by the German dramatist Bertolt Brecht written in collaboration with Margerete Steffin in 1933–34. It is a retelling of the story of the Horatii and Curiaces, a subject treated by Corneille (Horace) and subsequently by many opera composers (see Horatii). Commissioned by the Red Army, the play was printed in Moscow in 1936 but apparently never performed until 1958, two years after Brecht's death. The two choruses are the main characters and the work was intended to be sung throughout. Two letters (from August 29, 1935 and shortly thereafter) to Hans Eisler document Brecht's frustration over the attempted long distance collaboration with the composer, also in exile.