Today it refers mainly to the music of the Western Church – Old Roman, Ambrosian, and especially [[Gregorian chant|Gregorian]] forms which were the only forms of plainchant not suppressed by the [[Carolingian]] church. Today, Gregorian chant and plainchant (plainsong) have become synonymous. | Today it refers mainly to the music of the Western Church – Old Roman, Ambrosian, and especially [[Gregorian chant|Gregorian]] forms which were the only forms of plainchant not suppressed by the [[Carolingian]] church. Today, Gregorian chant and plainchant (plainsong) have become synonymous. |