Developed in the ninth and tenth centuries in Western Europe, Gregorian chants are a simple, monophonic form of music used as sacred music by monks in the Catholic tradition. Gregorian chants helped spread the Latin Rite of Roman Christianity by having a common, uniform musical style for worship. Among certain monastic orders, the Gregorian chant is still a common form of worship.

Gregorian chant is the style of music that developed throughout the Middle Ages, having various sources and styles. It was an ecclesiastical form of music, meaning that it was a "church" music. In particular, it was a kind of liturgical music, used in the various forms of public worship undertaken by the Latin Roman Catholic Church. Its melodies were based on the texts of the Mass, the Divine Office, and other liturgical ceremonies. Many of these texts were biblical, though adaptations from other sources are also found in many hymns and antiphons throughout the Middle Ages.

Gregorian chant is the style of music that developed throughout the Middle Ages, having various sources and styles. It was an ecclesiastical form of music, meaning that it was a "church" music. In particular, it was a kind of liturgical music, used in the various forms of public worship undertaken by the Latin Roman Catholic Church. Its melodies were based on the texts of the Mass, the Divine Office, and other liturgical ceremonies. Many of these texts were biblical, though adaptations from other sources are also found in many hymns and antiphons throughout the Middle Ages.

Developed in the ninth and tenth centuries in Western Europe, Gregorian chants are a simple, monophonic form of music used as sacred music by monks in the Catholic tradition. Gregorian chants helped spread the Latin Rite of Roman Christianity by having a common, uniform musical style for worship. Among certain monastic orders, the Gregorian chant is still a common form of worship.

Gregorian chant is the style of music that developed throughout the Middle Ages, having various sources and styles. It was an ecclesiastical form of music, meaning that it was a "church" music. In particular, it was a kind of liturgical music, used in the various forms of public worship undertaken by the Latin Roman Catholic Church. Its melodies were based on the texts of the Mass, the Divine Office, and other liturgical ceremonies. Many of these texts were biblical, though adaptations from other sources are also found in many hymns and antiphons throughout the Middle Ages.

Gregorian chant is the style of music that developed throughout the Middle Ages, having various sources and styles. It was an ecclesiastical form of music, meaning that it was a "church" music. In particular, it was a kind of liturgical music, used in the various forms of public worship undertaken by the Latin Roman Catholic Church. Its melodies were based on the texts of the Mass, the Divine Office, and other liturgical ceremonies. Many of these texts were biblical, though adaptations from other sources are also found in many hymns and antiphons throughout the Middle Ages.

Developed in the ninth and tenth centuries in Western Europe, Gregorian chants are a simple, monophonic form of music used as sacred music by monks in the Catholic tradition. Gregorian chants helped spread the Latin Rite of Roman Christianity by having a common, uniform musical style for worship. Among certain monastic orders, the Gregorian chant is still a common form of worship.

Developed in the ninth and tenth centuries in Western Europe, Gregorian chants are a simple, monophonic form of music used as sacred music by monks in the Catholic tradition. Gregorian chants helped spread the Latin Rite of Roman Christianity by having a common, uniform musical style for worship. Among certain monastic orders, the Gregorian chant is still a common form of worship.

Strictly speaking, Gregorian Chant is a phenomenon of the Christian West. It was the liturgical music of the Latin Rite of the Roman Catholic Church, which dominated much (though not all) of Western Europe throughout the Middle Ages. While there were other forms of liturgical worship throughout this period, the Latin Rite was the "location" for the development of the Gregorian Chant repertoire. Its texts were taken from various parts of the liturgy, drawing on biblical sources as well as more original compositions by hymn and antiphon writers.

Rock 'n' roll developed in the mid-twentieth century as a combination of other genres, such as blues, country, and jazz. Despite its eclectic origins, the music was usually stripped down, featuring limited combos. The typical instrumentation of a rock combo is one or more guitars, electric bass, drums, and occasionally a piano, organ, or horns.