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
Agrippina (opera) hypocritical; Claudius is pompous, complacent, and something of a buffoon, while Poppaea, the first of Handel's sex kittens, is also a liar and a flirt. The freedmen Pallas and Narcissus are self-serving and salacious. All, however, have some redeeming features, and all have arias that express genuine emotion. The situations in which they find themselves are sometimes comic, but never farcical—like Mozart in the Da Ponte operas, Handel avoids laughing at his characters. In "Agrippina" the "da capo" aria is the musical form used to illustrate character in the context of the opera. The first four arias of the work