Metre (poetry) of over some two-and-a-half millennia. Beginning with the earlier recorded forms: the Classic of Poetry tends toward couplets of four-character lines, grouped in rhymed quatrains; and, the Chuci follows this to some extent, but moves toward variations in line length. Han Dynasty poetry tended towards the variable line-length forms of the folk ballads and the Music Bureau yuefu. Jian'an poetry, Six Dynasties poetry, and Tang Dynasty poetry tend towards a poetic metre based on fixed-length lines of five, seven, (or, more rarely six) characters/verbal units tended to predominate, generally in couplet/quatrain-based forms, of various total verse lengths. The Song poetry
Terzanelle stanza is: Terzanelle A terzanelle is a poetic form combining aspects of the villanelle and the terza rima. It is nineteen lines total, with five triplets and a concluding quatrain. The middle line of each triplet stanza is repeated as the third line of the following stanza, and the first and third lines of the initial stanza are the second and final lines of the concluding quatrain; thus, seven of the lines are repeated in the poem. The rhyme scheme and stanzaic structure are as follows (a capitalized letter indicates a line repeated verbatim): Or, for the alternate (couplet) ending,