Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Visual and Verbal Communication (hierarchy name)
4. Literary and Performing Arts Works (hierarchy name)
5. musical compositions
6. songs (musical compositions)
7. chants

Anotations

Scope note:

The official monophonic unison chants, originally unaccompanied, of Christian liturgies. Music was developed for voice, based on a system of modes and performed in free rhythm corresponding at least in part to the accentuation of the words, though often with considerable elaboration of the melody. In usuage, often applied chiefly to the music of the Western Church, particularly chants of the 4th-century St. Ambrose and in the 6th-century by St. Gregory the Great.