Like many masses, Beethoven's Missa solemnis is in five movements:
Kyrie eleison: Perhaps the most traditional movement, the Kyrie is in a traditional ABA′ structure. The grand opening 3 D major chords motif, contrasts sharply with the 4th pianissimo response: followed by humble stately choral writing in the first section and more contrapuntal vocal textures in the Christe section. The four vocal soloists and chorus share the thematic material throughout, the former particularly in the Christe Eleison section
Gloria: Quickly shifting textures and themes highlight each portion of the Gloria text, in a beginning to the movement that is almost encyclopedic in its exploration of time. The movement ends with the first of the work's two massive fugues, on the text "In gloria Dei patris. Amen", leading into a recapitulation of the initial Gloria text and music.
Credo: The movement opens with a chord sequence that will be used again in the movement to effect modulations. The Credo, like the Gloria, is an often disorienting, mad rush through the text. The poignant modalharmonies for the "Et incarnatus" yield to ever more expressive heights through the Crucifixus, and into a remarkable, a cappella setting of the "Et resurrexit" that is over almost before it has begun. Most notable about the movement, though, is the closing fugue on "Et vitam venturi saeculi" that includes one of the most difficult passages in the choral repertoire, when the subject returns at doubled tempo for a thrilling conclusion.
Sanctus: Up until the Benedictus of the Sanctus, the Missa solemnis is of fairly normal classical proportions. But then, after an orchestral preludio, a solo violin enters in its highest range—representing the Holy Spirit descending to earth in a remarkably long extension of the text.
Agnus Dei: A setting of the plea "miserere nobis" that begins with the men's voices alone in B minor yields, eventually, to a bright D major prayer "dona nobis pacem" in a pastoral mode. After some fugal development, it is suddenly and dramatically interrupted by martial sounds, but after repeated pleas of "miserere", eventually recovers and brings itself to a stately conclusion.
Scoring and music
The mass is scored for a quartet of vocal soloists, a substantial chorus, and the full orchestra, and each at times is used in virtuosic, textural, and melodic capacities. The orchestra consists 2 flutes; 2 oboes, 2 clarinets ; 2 bassoons; contrabassoon; 4 horns ; 2 trumpets ; alto, tenor, and bass trombone; timpani; organcontinuo; strings ; soprano, alto, tenor, and bass soloists; and mixed choir. The writing displays Beethoven's characteristic disregard for the performer, and is in several places both technically and physically exacting, with many sudden changes of dynamic, metre and tempo. This is consistent throughout, starting with the opening Kyrie where the syllables Ky-ri are delivered either forte or with sforzando, but the final e is piano. As noted above, the reprise of the Et vitam venturi fugue is particularly taxing, being both subtly different from the previous statements of the theme and counter-theme, and delivered at around twice the speed. The orchestral parts also include many demanding sections, including the violin solo in the Sanctus and some of the most demanding work in the repertoire for bassoon and contrabassoon. A typical performance of the complete work runs 80 to 85 minutes. The difficulty of the piece combined with the requirements for a full orchestra, large chorus, and highly trained soloists, both vocal and instrumental, mean that it is not often performed by amateur or semi-professional ensembles.
Reception
Some critics have been troubled that, as Theodor W. Adorno put it, "there is something peculiar about the Missa solemnis." In many ways, it is an atypical work, even for Beethoven. Missing is the sustained exploration of themes through development that is one of Beethoven's hallmarks. The massive fugues at the end of the Gloria and Credo align it with the work of his late period—but his simultaneous interest in the theme and variations form is absent. Instead, the Missa presents a continuous musical narrative, almost without repetition, particularly in the Gloria and Credo, the two longest movements. The style, Adorno has noted, is close to treatment of themes in imitation that one finds in the Flemish masters such as Josquin des Prez and Johannes Ockeghem, but it is unclear whether Beethoven was consciously imitating their techniques to meet the peculiar demands of the Mass text. Donald Tovey has connected Beethoven to the earlier tradition in a different way:
