Alexandrine introduce phrasal accentuation, or rigorously observe the medial caesura, as in French." Common usage within the literatures of European languages is broader still, embracing lines syllabic, accentual-syllabic, and (inevitably) stationed ambivalently between the two; lines of 12, 13, or even 14 syllables; lines with obligatory, predominant, and optional caesurae. Although alexandrines occurred in French verse as early as the 12th century, they were slightly looser rhythmically, and vied with the "décasyllabe" and "octosyllabe" for cultural prominence and use in various genres. "The alexandrine came into its own in the middle of the sixteenth century with the poets of the Pléiade
Alliterative verse with specific rules for the addition of extra unstressed syllables. Alliteration is the principal ornamental feature of Old English poetry. Two stressed syllables alliterate when they begin with the same sound. In addition to the general rules for alliteration in Germanic poetry listed above, there are some further complications due to sound-changes in Old English: The first stressed syllable of the off-verse, or second half-line, usually alliterates with one or both of the stressed syllables of the on-verse, or first half-line. The second stressed syllable of the off-verse does not usually alliterate with the others. Just as rhyme was seen