Vestas Feuer by Pamina and Papageno in "The Magic Flute"), which has the same key and time signature and was the subject of a set of variations for cello and piano by Beethoven (WoO 46), written 1801. Lockwood also discerns a precedent set by Mozart involving formal structure: an "Introduzione"; i.e. Beethoven's scene forms a separable initial section of an opera having some degree of integrity of both plot and harmonic plan; Lockwood calls the "Introduzione" a "miniplay". Three of Mozart's operas begin with such an "Introduzione": "Don Giovanni", "Così fan tutte", and "The Magic Flute". Beethoven's "Introduzione" has a harmonic structure
Mozart and dance it was rich in figures (individual movements and patterns) and was popular among all social classes. Mozart composed contredanses as a sequence of multiple sections. They sometimes quote popular melodies; for instance, K. 609 quotes the aria "Non più andrai" from Mozart's opera "The Marriage of Figaro". Of the three genres, minuets predominate in Mozart's early career, the latter two types later on. The core instrumentation of the dances is a simplified orchestra in which there are no violas, and the bass instruments (cello and double bass) play the same line. A variety of wind instruments is usually included, and