Gregorian Chant
Gregorian chant is a form of monophonic, unaccompanied sacred song in Latin and occasionally Greek of the Roman Catholic Church. It developed mainly in western and central Europe during the 9th and 10th centuries, with later additions and redactions.0 Gregorian chant is used to accompany the text of the mass and the canonical hours, or divine office.
Although popular legend credits Pope Gregory I with inventing Gregorian chant, scholars believe that it arose from a later Carolingian synthesis of the Old Roman chant and Gallican chant.[1]