There are different types of classical music; the most recognizable are symphony, opera, choral works, chamber music, Gregorian chant and the madrigal.
A symphony is an extended musical composition, scored almost always for orchestra. It usually contains at least one movement or episode.
Opera is type of classical music in which singers and musicians perform a dramatic work combining text (called a libretto) and musical score, usually in a theatrical setting.
Choral works is a musical ensemble of singers. Choral music, in turn, is the music written specifically for such an ensemble to perform.
Chamber music is a form of classical music, written for a small group of instruments which traditionally could be accommodated in a palace chamber. Most broadly, it includes any art music that is performed by a small number of performers with one performer to a part.
Gregorian chant a form of monophonic liturgical music within Western Christianity that accompanied the celebration of Mass and other ritual services. It is named after Pope Gregory I, Bishop of Rome from 590 to 604, who is traditionally credited for having ordered the simplification and cataloging of music.
Madrigals originated in Italy during the 1520s.In the madrigal, the composer attempted to express the emotion contained in each line, and sometimes individual words, of a celebrated poem. It is vocal music composition, usually a partsong, of the Renaissance and early Baroque eras. The number of voices varies from two to eight, and most frequently from three to six.