Guillaume Du Fay (French: [dy fa(j)i]; also Dufay, Du Fayt; 5 August, c. 1397 – 27 November 1474) was a Franco-Flemish composer of the early Renaissance. A central figure in the Burgundian School, he was regarded by his contemporaries as one of the leading composers in Europe in the mid-15th century. His uniquely contrapuntal and complex motet “Nuper rosarum flores” demonstrates the influential exchange of musical ideas among artists around the world during the early Renaissance period.