It was formerly performed in Rome, and is closely related to but distinct from the Gregorian chant, which gradually supplanted it between the 11th century and the 13th century AD.
It was formerly performed in Rome. It is closely related to but distinct from the Gregorian chant. The Gregorian chant gradually supplanted it between the 11th century. The Gregorian chant gradually supplanted it between the 13th century AD.