In the summer of 1791, Wolfgang Amadeus Mozart, already stretched thin by a demanding workload and deteriorating health, accepted a mysterious commission for a Requiem Mass. This project, shrouded in intrigue, would become one of the most profound and enduring works of his career. 

A Prolific Yet Perilous Time

By mid-1791, Mozart was at the peak of his creative powers, yet his physical condition was in sharp decline. The commission for the Requiem came in July, reportedly through an anonymous messenger, later revealed to be acting on behalf of Count Franz von Walsegg, who sought a memorial for his deceased wife. 

Mozart, driven by both financial need and a deep fascination with sacred music, accepted the task despite his packed schedule. His letters from this period reveal a man consumed by work, oscillating between bursts of inspiration and bouts of exhaustion. He wrote to his wife, Constanze, in October 1791, describing a sense of foreboding, as if the Requiem were for himself—a sentiment that has fueled much of the work’s mystique.

Mozart’s workload was relentless. Alongside the Requiem, he was finalizing The Magic Flute, which premiered to great acclaim on September 30, 1791, at Vienna’s Theater auf der Wieden. The opera’s success was a bright spot, but its demanding rehearsals and revisions consumed his energy. Simultaneously, La Clemenza di Tito, composed for Leopold II’s coronation, premiered in Prague on September 6, 1791, to a lukewarm reception. The effort of composing and traveling for these operas, combined with the Requiem, left Mozart physically and mentally drained.

The Shadow of Illness

Mozart’s health had been fragile for years, likely exacerbated by chronic overwork, financial stress, and possibly underlying medical conditions. By autumn 1791, his condition worsened significantly. In November, Mozart took to his bed, unable to continue his usual pace. His wife, Constanze, and her sister Sophie Weber cared for him, while friends and colleagues noted his increasing frailty.

Despite his illness, Mozart continued to work on the Requiem, driven by an almost obsessive dedication. He sketched portions of the score from his sickbed, dictating ideas to his pupil Franz Xaver Süssmayr and others. The Requiem’s somber themes—death, judgment, and redemption — seemed to resonate deeply with Mozart, who reportedly remarked that he felt he was writing his own requiem. By early December, his condition deteriorated further, and on December 5, 1791, Mozart died at the age of 35, leaving the Requiem unfinished.

Completing the Requiem

At the time of Mozart’s death, the Requiem was incomplete, with only the Introit and Kyrie fully orchestrated in his hand. Other sections, including the Sequence (up to the Lacrimosa, of which only eight bars were completed) and the Offertory, existed in vocal parts and partial instrumentation. Constanze, determined to fulfill the commission and secure the payment, enlisted Mozart’s pupils to complete the work. Joseph Eybler initially took on the task, adding orchestration to several movements, but he ultimately withdrew, overwhelmed by the responsibility.

The bulk of the completion fell to Franz Xaver Süssmayr, Mozart’s student and confidant. Süssmayr relied on Mozart’s sketches, verbal instructions, and his own understanding of Mozart’s style to finish the Sequence (notably the Lacrimosa), Offertory, Sanctus, Benedictus, and Agnus Dei. He also reused Mozart’s music from the Introit and Kyrie for the Communio to create a sense of unity. While Süssmayr’s work has been criticized for inconsistencies, it preserved the commission and allowed the Requiem to be delivered to Count Walsegg in early 1792.

While scholars advocate for alternative completions by modern musicologists, Süssmayr’s version remains the most widely performed, valued for its emotional depth and historical significance.

The Premiere and Early Reception

The Requiem was first performed in its entirety on January 2, 1793, at a benefit concert for Constanze Mozart, organized by Gottfried van Swieten at Vienna’s Jahn’s Hall. This performance introduced the work to the public, showcasing its haunting beauty and emotional intensity.

The Requiem quickly gained recognition for its profound expressiveness, blending Baroque influences (inspired by Mozart’s study of Bach and Handel) with his signature Classical clarity and emotional depth. Its dramatic choral writing, intricate counterpoint, and evocative orchestration — particularly in movements like the Dies Irae and Lacrimosa — captivated audiences and musicians alike.

The Requiem’s Enduring Legacy

Mozart’s Requiem in D minor has transcended its origins to become one of the most revered works in the Western classical canon. For music lovers worldwide, it represents the pinnacle of sacred music, imbued with a sense of universality and timelessness. Its themes of mortality and redemption resonate across cultures and eras, amplified by the tragic circumstances of Mozart’s death and the work’s unfinished state.

The Requiem has inspired countless performances, recordings, and reinterpretations, from grand cathedral settings to intimate chamber arrangements. Its use in films, such as Amadeus (1984), has cemented its place in popular culture, where the Lacrimosa often evokes profound grief and awe. Musicologists and performers continue to grapple with its mysteries, debating Mozart’s intentions and exploring new completions, yet the Süssmayr version endures as a testament to Mozart’s genius and his collaborators’ dedication.

For many, the Requiem is more than a musical composition — it’s a window into Mozart’s soul, capturing his brilliance and vulnerability in his final days. Its blend of fear, hope, and transcendence ensures its place as a cornerstone of human artistic expression, inviting listeners to reflect on life, death, and the eternal.

Chorus Polaris performs Mozart’s Requiem

You have two opportunities to experience one of the monumental achievements in Western classical music this month: April 6th and April 13th.

At 3:00 p.m. on April 6, Chorus Polaris joins Mississippi Valley Orchestra and the A Capella choir of Westwood Lutheran Church (St. Louis Park, MN) to perform Mozart’s Requiem at Bethel University’s Great Benson Hall. Your second opportunity will be at 3:00 p.m. on April 13 at Westwood Lutheran Church (9001 Cedar Lake Road, St. Louis Park, MN). 

Make plans now to experience the haunting beauty and profound depth of this lasting tribute to Mozart’s genius – his poignant final contribution to the world of music.