The document describes the structure and characteristics of a villanelle, a nineteen-line poem composed of five tercets followed by a quatrain with two refrains. A villanelle has an alternating rhyme scheme and uses the same two lines as refrains, with one refrain closing the first and third lines of the first stanza, and then alternating at the close of subsequent stanzas until the final quatrain which uses both refrains. Famous poets who have written villanelles include Dylan Thomas, W.H. Auden, and Elizabeth Bishop.