Oedipus Rex is an opera-oratorio by Igor Fyodorovich Stravinsky, premiered in 1927. The work combines neoclassical forms, austere, ritualistic choral writing and a declamatory, quasi-ancient vocal style set against a lean, rhythmically driven orchestra, and it marks a key moment in Stravinsky's neoclassical phase as he reworked classical subject matter using modernist techniques.