On Wednesday 7th May 2025, the Orchestra of the Age of Enlightenment will mark the 300th anniversary of Johann Sebastian Bach’s 1725 Ascension Day cantataAuf Christi Himmelfahrt allein (BWV 128) with a performance at Oxford’s Sheldonian Theatre produced by the Oxford Cultural Programme. The event will feature a world premiere from Judith Weir, one of the UK’s most celebrated contemporary composers, commissioned by the Bodleian Libraries. Weir’s composition was created in direct response to the autograph manuscript of Auf Christi Himmelfahrt allein, acquired by the Bodleian Libraries via the government’s Acceptance in Lieu scheme in 2024.
The concert is a rare opportunity to experience Bach’s festive and colourful composition for orchestra, chorus, and soloists, originally written for Ascension Day in May 1725. John Butt, a world-leading Bach scholar and performer, will direct the Orchestra of the Age of Enlightenment alongside the Choir of New College, Oxford, under the guidance of its director, Robert Quinney. Adding to the evening’s significance, the programme will feature new works from student composers Daniel Reynolds and Nick Samuel from the Faculty of Music at Oxford University, responding to Bach’s enduring legacy.
The Kohn manuscript of BWV 128, formerly owned by the Leipzig-born collector Sir Ralph Kohn, is one of only four Bach manuscripts in the UK. It will appear on public display at the Weston Library ahead of the concert, offering audiences a rare chance to connect Bach’s creative process to a tangible object. Despite his prolific production, very few of Bach’s works were published in his lifetime, and without the miraculous survival of his autograph manuscripts in institutional collections, most of his masterpieces would be lost. The document has been exceptionally well cared for and the erosion of paper is mostly limited to the edges, making this one of the best-preserved autographs of Johann Sebastian Bach.
Judith Weir’s New Composition
As part of this celebration, the Orchestra of the Age of Enlightenment will premiere a new work by Judith Weir, former Master of the King’s Music, commissioned by the Bodleian Libraries. Renowned for her innovative approach to storytelling through music, Weir’s composition will offer a contemporary reflection on themes from Bach’s cantata. The manuscript of this new work will pass into the Bodleian Libraries’ collections, meaning that both this new work and Bach’s original piece will be preserved for posterity.
Judith Weir said: “Following so closely in J S Bach’s footsteps – and indeed his pen strokes and ink blots – has been a unique and joyous experience. Mirroring Bach’s original score note-for-note, it’s impossible not to be influenced by the extraordinary energy and uplift of his Ascension music. The opportunity to present my new score to the Bodleian Libraries reflects my own feeling of inheritance as a lifelong listener to Bach’s music.”
Judith Weir CBE
Auf Christi Himmelfahrt allein
Auf Christi Himmelfahrt allein was composed for the feast of the Ascension, 10 May 1725, celebrating Christ’s triumphant rise to Heaven forty days after the Resurrection, but it did not appear in print until 1878, 150 years after it was composed.
The short, festive cantata, which lasts less than 20 minutes in performance, is scored for two horns, three different types of oboe, trumpet, strings and continuo, with four-part chorus, and alto, tenor and bass soloists. Its five movements comprise a celebratory opening chorus, a short recitative and aria for bass voice, a duet for alto and tenor, ending with a simple chorale. The music for this cantata was all new, which is relatively unusual for Bach who frequently recycled and adapted movements from his other compositions.
The text for Auf Christi Himmelfahrt allein was written by Marianne von Ziegler—the only known female librettist Bach worked with. A pioneering figure in 18th-century Leipzig, von Ziegler was an accomplished poet and intellectual who defied societal norms, gaining recognition in her lifetime without adopting a male pseudonym. Her collaborations with Bach in 1725 produced a sequence of extraordinary cantatas, yet the full extent of their working relationship remains a mystery.
Bach 1725 is taking place on Wednesday 7 May at the Sheldonian Theatre – tickets are available now. You can also look at the Kohn manuscript online on Digital Bodleian.
Auf Christi Himmelfahrt allein (Cantata, BWV 128), Kohn manuscript.
