When did Gregorian chant first develop?
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.
Pope Gregory I
The mainstream form of Western plainchant, standardized in the late 9th century, was attributed to Pope Gregory I and so took the name of Gregorian chant. The earliest such attribution is in John the Deacon's 873 biography of Gregory, almost three centuries after the pope's death, and the chant that bears his name "is the result of the fusion of Roman and Frankish elements which took place in the Franco-German empire under Pepin, Charlemagne and their successors".