This document discusses the key components and characteristics of Baroque opera. It provides background on the origins of opera and its precursors. The main components of Baroque opera are identified as poetry, singing, instrumental music, acting, scenery and costumes. Characteristics discussed include the use of recitatives to advance the plot, arias for reflection on emotions, and basso continuo accompaniment. Prominent composers of Baroque opera such as Monteverdi, Purcell and Handel are profiled. An example aria by Purcell from Dido and Aeneas is analyzed in its dramatic and musical form.