Fantasia on a Theme by Thomas Tallis, also known as the Tallis Fantasia, is a one-movement work for string orchestra by Ralph Vaughan Williams. The theme is by the 16th-century English composer Thomas Tallis. The Fantasia was first performed at Gloucester Cathedral as part of the 1910 Three Choirs Festival, and has entered the orchestral repertoire, with frequent concert performances and recordings by conductors and orchestras of various countries. Background and first performance Vaughan Williams did not achieve wide recognition early in his career as a composer, but by 1910, in his late thirties, he was gaining a reputation. In that year the Three Choirs Festival commissioned a work from him, to be premiered in Gloucester Cathedral; this represented a considerable boost to his standing. He composed what his biographer James Day calls "unquestionably the first work by Vaughan Williams that is recognizably and unmistakably his and no one else's". It is based on a tune by the 16th-century English composer Thomas Tallis, which Vaughan Williams had come across while editing the English Hymnal, published in 1906. Vaughan Williams conducted the London Symphony Orchestra in the first performance of the Fantasia, as the first part of a concert in Gloucester Cathedral on 6 September 1910, followed by Elgar's The Dream of Gerontius, conducted by its composer. Music Theme Like several other of Vaughan Williams's works, the Fantasia draws on the music of the English Renaissance. Tallis's tune is in the Phrygian mode, characterised by intervals of a flat second, third, sixth and seventh; the pattern is reproduced by playing the white notes of the piano starting on E. Tallis's theme was one of nine tunes he wrote for the Psalter of 1567 of the Archbishop of Canterbury, Matthew Parker. It was a setting of Parker's metrical version of Psalm 2, which in the King James Bible version begins, "Why do the heathen rage, and the people imagine a vain thing?", and is rendered by Parker as "Why fumeth in sight: The Gentils spite, In fury raging stout? Why taketh in hond: the people fond, Vayne things to bring about?". The tune is in Double Common Metre (D.C.M. or C.M.D.). According to his biographer Michael Kennedy, Vaughan Williams came to associate Tallis's theme with John Bunyan's Christian allegory, The Pilgrim's Progress, a subject with which the composer had a lifelong fascination; he used the tune in 1906 in incidental music he