The subject is music Who is considered the greatest composer of the fourteenth century?
O Guillaume de Machaut
O Pope Gregory
O Guido d'Arezzo
O Hildegard von Bergen

The answer is the first one. Guillaume de Machaut

The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.