Binchois is often considered[by whom?] to be the finest melodist of the 15th century, writing carefully shaped lines which are not only easy to sing but utterly memorable. His tunes appeared in copies decades after his death, and were often used as sources for Mass composition by later composers. Most of his music, even his sacred music, is simple and clear in outline, sometimes even ascetic; a greater contrast between Binchois and the extreme complexity of the ars subtilior of the prior (fourteenth) century would be hard to imagine. Most of his secular songs are rondeaux, which became the most common song form during the century. He rarely wrote in strophic form, and his melodies are generally independent of the rhyme scheme of the verses they are set to. Binchois wrote music for the court, secular songs of love and chivalry that met the expectations and satisfied the taste of the Dukes of Burgundy who employed him, and evidently loved his music accordingly. About half of his extant secular music is found in the manuscript Oxford, Bodleian Library MS Canon. misc. 213