Love's Illusion: Music From the Montpellier Codex, 13th Century

Ars antiqua is a medieval European musical style that flourished roughly from the late 12th century to the early 14th century, with its center of gravity in Paris and the Notre Dame Cathedral school. It is defined by the consolidation of measured rhythm through the six rhythmic modes, the cultivation of polyphony in organum and discant styles, and the emergence of the early motet and conductus. Composers favored two to four vocal parts, with a chant-derived tenor forming the foundation and upper voices providing melismatic and texted counterpoint. Harmony emphasized perfect consonances (unisons, fourths, fifths, and octaves), with cadences carefully prepared. Ars antiqua laid crucial groundwork for European notation (including Franconian mensural concepts), enabling more precise rhythmic coordination and setting the stage for the innovations of the later Ars nova.

Medieval classical music refers to the body of sacred and secular art music created in Europe from roughly the 5th to the late 15th centuries. It encompasses the Christian chant traditions of the early Middle Ages, the emergence of notated polyphony in the High Middle Ages, and the rhythmically and formally sophisticated Ars Nova of the 14th century. At its core are modal melodies (church modes), primarily vocal textures, and a gradual evolution from monophony (single melodic line) to increasingly complex polyphony. Notation develops from adiastematic neumes to staff-based pitch notation and, later, mensural systems that codify rhythm. Characteristic sonorities emphasize perfect consonances (octaves, fifths, and fourths), with triadic harmony only beginning to coalesce near the end of the period. Though rooted in the liturgy (Mass, Office, and Latin song), the era also nurtured rich vernacular traditions—troubadours, trouvères, Minnesänger—and instrumental practices on harp, vielle, recorder, lute, and organ. The period laid the foundational techniques, theories, and repertories that define the entire subsequent Western classical tradition.