A nineteen-line poem which follows a strict form, traditionally made up of five tercets followed by a quatrain.  There are only two rhyme sounds used throughout the poem, with the first and third lines of the first tercet repeated alternately throughout the poem, then coming together as the quatrain’s closing couplet. ‘Missing Dates‘ by William Empson is a good example of a strict-form villanelle, as is ‘Do not go gentle into that good night‘ by Dylan Thomas.