Kyrielle
The kyrielle is a poetic form that originated in troubadour poetry.
The name kyrielle derives from the Kýrie, which is part of many Christian liturgies. A kyrielle is written in rhyming couplets or quatrains. It may use the phrase "Lord, have mercy", or a variant on it, as a refrain as the second line of the couplet or last line of the quatrain. In less strict usage, other phrases, and sometimes single words, are used as the refrain. Each line within the poem consists of only eight syllables. There is no limit to the number of stanzas a Kyrielle may have, but three is considered the accepted minimum.