query: When did Gregorian chant first develop?
passage: Gregorian chant
Gregorian chant is the central tradition of Western plainchant, a form of monophonic, unaccompanied sacred song of the Roman Catholic Church. Gregorian chant developed mainly in western and central Europe during the 9th and 10th centuries, with later additions and redactions. Although popular legend credits Pope Gregory I with inventing Gregorian chant, scholars believe that it arose from a later Carolingian synthesis of Roman chant and Gallican chant.
passage: Composer
During the Medieval music era (476 to 1400), composers wrote monophonic (single melodic line) chanting into Roman Catholic Church services. Western Music then started becoming more of an art form with the advances in music notation. The only European Medieval repertory that survives from before about 800 is the monophonic liturgical plainsong of the Roman Catholic Church, the central tradition of which was called Gregorian chant. Alongside these traditions of sacred and church music there existed a vibrant tradition of secular song (non-religious songs). Examples of composers from this period are Léonin, Pérotin and Guillaume de Machaut.