Theresienmesse

Theresienmesse is a mass in B-flat major written by Joseph Haydn and named after Maria Theresa of the Two Sicilies, empress consort of Francis [II, Holy Roman Emperor|Francis II]. The empress herself was the soprano soloist at private performances of both The [Creation |The Creation] and The Seasons in May 1801 at the Viennese Court.
The title does not appear on the autograph score, which is labeled simply with the Latin word "Missa".
Between 1796 and 1802, Haydn composed six masses to celebrate the name-day of Princess , who was the wife of his patron Nikolaus II, Fürst [Esterházy de Galántha|Prince Nikolaus Esterhazy II]. The Theresienmesse, written in 1799, belongs in this series.
The work is thought to have been premiered on 8 September 1799. The location was the Bergkirche, near the Esterházy family seat in Eisenstadt, Austria.
The mass is scored for solo quartet, chorus, strings, two clarinets, two trumpets, timpani and organ continuo. Concerning the paucity of winds John W. Ehrlich has written:
While probably not as frequently performed as its companions the Nelson Mass or the Missa in tempore belli, the Theresienmesse has attracted critical admiration; Ehrlich for instance refers to it as an "extraordinary work." Another commentator writes, "Haydn's choral writing has all the variety, rhythmic energy and contrapuntal skill of a composer at the height of his powers."

Scoring and structure

The vocal parts of the mass are performed by four soloists and a four-part choir. The soloists often appear as an ensemble, without arias. Haydn scored the mass for a large orchestra.
In the following table of the movements, the markings, keys and time signatures are taken from the choral score, using the symbols for common time and alla breve. The choir is present in all movements, except the Et incarnatus of the Credo.

No.	Part	Incipit	Solo voices	Marking	Key	Time
1	Kyrie		S A T B S A T B	Adagio Allegro Adagio	B-flat major
2	Gloria	Gloria in excelsis Deo		Allegro	B-flat major
2	Gloria	Gratias agimus tibi	S A T B	Moderato	C major C minor
2	Gloria	Quoniam tu solus Sanctus	S A T B	Vivace	B-flat major
3	Credo	Credo in unum Deum		Allegro	B-flat major
3	Credo	Et incarnatus est	S A T B	Adagio	B-flat minor
3	Credo	Et resurrexit	S A T B	Allegro	B-flat major
3	Credo	Et vitam venturi saeculi	S A T B	Allegro	B-flat major
4	Sanctus	Sanctus Dominus	S A T B	Andante	B-flat major
4	Sanctus	Pleni sunt coeli et terra		Allegro	B-flat major
5	Benedictus	Benedictus qui venit	S A T B	Moderato	G major
6	Agnus Dei	Agnus Dei		Adagio	G minor
6	Agnus Dei	Dona nobis pacem	S A T B	Allegro	B-flat major