Romeo and Juliet, TH 42, ČW 39, is an orchestral work composed by Pyotr Ilyich Tchaikovsky. It is styled an Overture-Fantasy, and is based on Shakespeare's play of the same name. Like other composers such as Berlioz and Prokofiev, Tchaikovsky was deeply inspired by Shakespeare and wrote works based on The Tempest and Hamlet as well.
Unlike Tchaikovsky's other major compositions, Romeo and Juliet does not have an opus number. It has been given the alternative catalogue designations TH 42 and ČW 39.
Although styled an 'Overture-Fantasy' by the composer, the overall design is a symphonic poem in sonata form with an introduction and an epilogue. The work is based on three main strands of the Shakespeare story. The first strand, written in F-sharp minor, following Mily Balakirev's suggestion, is the introduction representing the saintly Friar Laurence. Here there is a foreboding of doom from the lower strings. The Friar Laurence theme is heard in F minor, with plucked strings, before ending up in E minor. The introduction is chorale-like.
Eventually a single first inversion B minor chord is passed back and forth between strings and woodwinds grows into the second strand in B minor, the agitated theme of the warring Capulets and Montagues, including a reference to the sword fight, depicted by crashing cymbals. There are agitated, quick sixteenth notes. The forceful irregular rhythms of the street music point ahead to Igor Stravinsky and beyond. The action suddenly slows, the key changing from B minor to D-flat (as suggested by Balakirev) and we hear the opening bars of the "love theme", the third strand, passionate and yearning in character but always with an underlying current of anxiety.