John Dunstaple, English composer (b. 1390)
John Dunstaple (or Dunstable, c. 1390 – 24 December 1453) was an English composer who was the leading composer of 15th century England and among the most influential composers of his time. He developed the contenance angloise style ("English manner"), which pioneered the prominent use of harmonies with thirds and sixths. Crucial in the developing style of the Burgundian School, Dunstaple's music spans the transition from the medieval to the Renaissance periods.His reputation eclipsed that of his contemporary Leonel Power and the other contributors to the Old Hall Manuscript. The contenance angloise style was continued by John Hothby and Walter Frye after his death.