The document summarizes music of the medieval and Renaissance periods. It describes Gregorian chant as monophonic, free meter, modal, and based on Latin liturgy. Troubadour music was also monophonic with occasional accompaniment focused on chivalry and courtly love. During the Renaissance, music became more popular for entertainment. Polyphony became common, with imitation among voices and word painting. Vocal music included the Mass, with its five sections (Kyrie, Gloria, Credo, Sanctus/Benedictus, Agnus Dei) and the madrigal, a secular polyphonic form. Famous composers included Giovanni Pierluigi da Palestrina and Thomas Morley.