Gluck in the context of "Opera seria"

A number opera (Italian: opera a numeri; German: Nummeroper; French: opéra à numéros) is an opera consisting of individual pieces of music ('numbers') which can be easily extracted from the larger work. They may be numbered consecutively in the score, and may be interspersed with recitative or spoken dialogue. Opera numbers may be arias, but also ensemble pieces, such as duets, trios, quartets, quintets, sextets or choruses. They may also be ballets and instrumental pieces, such as marches, sinfonias, or intermezzi. The number opera format was standard until the mid-19th century and most opera genres, including opera seria, opera buffa, opéra comique, ballad opera, Singspiel, and grand opera, were constructed in this fashion.

The replacement of numbers with more continuous music began in operas by Jommelli, Traetta, Gluck, and especially Mozart, whose late operas Le Nozze di Figaro and Don Giovanni contain several segments in which different numbers are unified by bridge passages to form a musical whole. This trend became even more striking in the operas of the German composers Beethoven, Weber, and Meyerbeer, while their Italian and French contemporaries Rossini, Donizetti, Bellini, and Auber retained the number opera style.

The gavotte (also gavot, gavote, or gavotta) is a French dance, taking its name from a folk dance of the Gavot, the people of the Pays de Gap region of Dauphiné in the southeast of France, where the dance originated, according to one source. According to another reference, the word gavotte is a generic term for a variety of French folk dances, and most likely originated in Lower Brittany in the west, or possibly Provence in the southeast or the French Basque Country in the southwest of France. It is notated in
₄ or
₂ time and is usually of moderate tempo, though the folk dances also use meters such as
₈ and
₈.

In late 16th-century Renaissance dance, the gavotte is first mentioned as the last of a suite of branles. Popular at the court of Louis XIV, it became one of many optional dances in the classical suite of dances. Many were composed by Lully, Rameau and Gluck, and the 17th-century cibell is a variety. The dance was popular in France throughout the 18th century and spread widely. In early courtly use the gavotte involved kissing, but this was replaced by the presentation of flowers.