Guillaume de Machaut was a French composer and poet who was the central figure of the ars nova style in late medieval music. His dominance of the genre is such that modern musicologists use his death
Machaut (right) receiving Nature and three of her children, from an illuminated Parisian manuscript of the 1350s
A chanson about love, Belle, bonne, sage, by Baude Cordier, is in a heart shape, with red notes indicating rhythmic alterations.