"L'homme armé" is a secular song from the Late Middle Ages, of the Burgundian School. According to Allan W. Atlas, "the tune circulated in both the Mixolydian mode and Dorian mode ." It was the most popular tune used for musical settings of the Ordinary of the Mass: over 40 separate compositions entitled Missa L'homme armé survive from the period.

The Burgundian School was a group of composers active in the 15th century in what is now northern and eastern France, Belgium, and the Netherlands, centered on the court of the Dukes of Burgundy. The school inaugurated the music of Burgundy.