<P> For specific medieval music theorists, see also: Isidore of Seville, Aurelian of Réôme, Odo of Cluny, Guido of Arezzo, Hermannus Contractus, Johannes Cotto (Johannes Afflighemensis), Johannes de Muris, Franco of Cologne, Johannes de Garlandia (Johannes Gallicus), Anonymous IV, Marchetto da Padova (Marchettus of Padua), Jacques of Liège, Johannes de Grocheo, Petrus de Cruce (Pierre de la Croix), and Philippe de Vitry . </P> <P> Chant (or plainsong) is a monophonic sacred (single, unaccompanied melody) form which represents the earliest known music of the Christian church . Chant developed separately in several European centres . Although the most important were Rome, Hispania, Gaul, Milan, and Ireland, there were others as well . These styles were all developed to support the regional liturgies used when celebrating the Mass there . Each area developed its own chant and rules for celebration . In Spain and Portugal, Mozarabic chant was used and shows the influence of North African music . The Mozarabic liturgy even survived through Muslim rule, though this was an isolated strand and this music was later suppressed in an attempt to enforce conformity on the entire liturgy . In Milan, Ambrosian chant, named after St. Ambrose, was the standard, while Beneventan chant developed around Benevento, another Italian liturgical center . Gallican chant was used in Gaul, and Celtic chant in Ireland and Great Britain . </P> <P> Around AD 1011, the Roman Catholic Church wanted to standardize the Mass and chant across its empire . At this time, Rome was the religious centre of western Europe, and Paris was the political centre . The standardization effort consisted mainly of combining these two (Roman and Gallican) regional liturgies . Pope Gregory I and Charlemagne sent trained singers throughout the Holy Roman Empire to teach this new form of chant . This body of chant became known as Gregorian Chant, named after Pope Gregory I. By the 12th and 13th centuries, Gregorian chant had superseded all the other Western chant traditions, with the exception of the Ambrosian chant in Milan and the Mozarabic chant in a few specially designated Spanish chapels . Hildegard von Bingen (1098--1179) was the earliest known female composer . She wrote many monophonic works for the Catholic Church, almost all of them for female voices . </P> <Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (May 2017) (Learn how and when to remove this template message) </Td> </Tr> </Table>

Influence of roman catholic church on music in middle ages
find me the text answering this question