Léonin
Encyclopedia
Léonin (fl.
Floruit
Floruit , abbreviated fl. , is a Latin verb meaning "flourished", denoting the period of time during which something was active...

1150s — d.
Death
Death is the permanent termination of the biological functions that sustain a living organism. Phenomena which commonly bring about death include old age, predation, malnutrition, disease, and accidents or trauma resulting in terminal injury....

? 1201) is the first known significant composer of polyphonic
Polyphony
In music, polyphony is a texture consisting of two or more independent melodic voices, as opposed to music with just one voice or music with one dominant melodic voice accompanied by chords ....

 organum
Organum
Organum is, in general, a plainchant melody with at least one added voice to enhance the harmony, developed in the Middle Ages. Depending on the mode and form of the chant, a supporting bass line may be sung on the same text, the melody may be followed in parallel motion , or a combination of...

. He was probably French
France
The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

, probably lived and worked in Paris
Paris
Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

 at the Notre Dame Cathedral
Notre Dame de Paris
Notre Dame de Paris , also known as Notre Dame Cathedral, is a Gothic, Roman Catholic cathedral on the eastern half of the Île de la Cité in the fourth arrondissement of Paris, France. It is the cathedral of the Catholic Archdiocese of Paris: that is, it is the church that contains the cathedra of...

 and was the earliest member of the Notre Dame school
Notre Dame school
The group of composers working at or near the Notre Dame Cathedral in Paris from about 1160 to 1250, along with the music they produced, is referred to as the Notre Dame school, or the Notre Dame School of Polyphony....

 of polyphony
Polyphony
In music, polyphony is a texture consisting of two or more independent melodic voices, as opposed to music with just one voice or music with one dominant melodic voice accompanied by chords ....

 and the ars antiqua
Ars antiqua
Ars antiqua, also called ars veterum or ars vetus, refers to the music of Europe of the late Middle Ages between approximately 1170 and 1310, covering the period of the Notre Dame school of polyphony and the subsequent years which saw the early development of the motet...

 style who is known by name. The name Léonin is derived from "Leoninus," which is the Latin diminutive of the name Leo; therefore it is likely that Léonin's given French name was Léo.

All that is known about him comes from the writings of a later student at the cathedral known as Anonymous IV
Anonymous IV
Anonymous IV is the designation given to the writer of an important treatise of medieval music theory. He was probably an English student working at Notre Dame in Paris, most likely in the 1270s or 1280s. Nothing is known about his life, not even his name...

, an Englishman
England
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 who left a treatise on theory and who mentions Léonin as the composer of the Magnus Liber
Magnus Liber
The Magnus Liber or Magnus Liber Organi is a compilation of the medieval music known as organum. The whole name of the work is Magnus liber organi de graduali et antiphonario pro servitio divino...

,
the "great book" of organum. Much of the Magnus Liber is devoted to clausulae
Clausula
In Roman rhetoric, a clausula was a rhythmic figure used to add finesse and finality to the end of a sentence or phrase. There was a large range of popular clausulae...

melisma
Melisma
Melisma, in music, is the singing of a single syllable of text while moving between several different notes in succession. Music sung in this style is referred to as melismatic, as opposed to syllabic, where each syllable of text is matched to a single note.-History:Music of ancient cultures used...

tic portions of Gregorian chant
Gregorian chant
Gregorian chant is the central tradition of Western plainchant, a form of monophonic liturgical music within Western Christianity that accompanied the celebration of Mass and other ritual services...

 which were extracted into separate pieces where the original note values of the chant were greatly slowed down and a fast-moving upper part is superimposed. Léonin might have been the first composer to use the rhythmic mode
Rhythmic mode
In medieval music, the rhythmic modes were set patterns of long and short durations . The value of each note is not determined by the form of the written note , but rather by its position within a group of notes written as a single figure called a "ligature", and by the position of the ligature...

s, and maybe he invented a notation for them. According to W.G. Waite
William Waite
William G. Waite was an American-born musicologist.Waite was educated and taught solely at Yale. He began his teaching career in 1947 and received his PhD in 1951. His dissertation, The Rhythm of Twelfth-Century Polyphony: its Theory and Practice outlines his ideas on modal interpretation of...

, writing in 1954: "It was Léonin's incomparable achievement to introduce a rational system of rhythm
Rhythm
Rhythm may be generally defined as a "movement marked by the regulated succession of strong and weak elements, or of opposite or different conditions." This general meaning of regular recurrence or pattern in time may be applied to a wide variety of cyclical natural phenomena having a periodicity or...

 into polyphonic
Polyphony
In music, polyphony is a texture consisting of two or more independent melodic voices, as opposed to music with just one voice or music with one dominant melodic voice accompanied by chords ....

 music for the first time, and, equally important, to create a method of notation expressive of this rhythm."

The Magnus Liber was intended for liturgical
Liturgy
Liturgy is either the customary public worship done by a specific religious group, according to its particular traditions or a more precise term that distinguishes between those religious groups who believe their ritual requires the "people" to do the "work" of responding to the priest, and those...

 use. According to Anonymous IV, "Magister Leoninus (Léonin) was the finest composer of organum; he wrote the great book (Magnus Liber) for the gradual
Gradual
The Gradual is a chant or hymn in the liturgical celebration of the Eucharist for many Christian denominations. In the Tridentine Mass it was and is sung after the reading or chanting of the Epistle and before the Alleluia, or, during penitential seasons, before the Tract. In the Mass of Paul VI...

 and antiphoner
Antiphonary
An Antiphonary, Antiphonal, "Antiphony" or Antiphoner is one of the present Catholic liturgical books. It is intended for use in choro An Antiphonary, Antiphonal, "Antiphony" or Antiphoner (Latin antiphonarium, antiphonarius, antiphonarius liber, antiphonale; Greek ’antíphonon, antiphon,...

 for the sacred service." All of the Magnus Liber is for two voices, although little is known about actual performance practice: the two voices were not necessarily soloists.

According to Anonymous IV, Léonin's work was improved and expanded by the later composer Pérotin
Pérotin
Pérotin , also called Perotin the Great, was a European composer, believed to be French, who lived around the end of the 12th and beginning of the 13th century. He was the most famous member of the Notre Dame school of polyphony and the ars antiqua style...

. See also Medieval music
Medieval music
Medieval music is Western music written during the Middle Ages. This era begins with the fall of the Roman Empire and ends sometime in the early fifteenth century...

.

The musicologist Craig Wright believes that Léonin may have been the same person as a contemporaneous Parisian poet, Leonius, after whom Leonine verse
Leonine verse
Leonine verse is a type of versification based on internal rhyme, and commonly used in Latin verse of the European Middle Ages. The invention of such conscious rhymes, foreign to Classical Latin poetry, is traditionally attributed to a probably apocryphal monk Leonius, who is supposed to be the...

may have been named. This could make Léonin's use of meter even more significant.http://72.14.209.104/search?q=cache:PH-2boaqasEJ:www.oup.com/us/brochure/0195169794/samplechapter.pdf+leonius+medieval+music&hl=en&gl=us&ct=clnk&cd=9
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