The romantic period marks the beginning of an extraordinary period of alterations to the versification, because the drastic rules, in force since Malherbe, are now felt as heavy regulations. Also, it is a period when poets turn towards a literary and popular past, from where they can unearth the forgotten and despised forms that they help to come back into fashion. The fascination that all of them, mainly, experience for the song has, consequently, the launching into the Great poetry of new forms which were, till then, reserved to popular songs and to the appropriate poetry : the poetic song, a brand new ground for a formal innovation, has hugely contributed in the fame of the poets of the 19th century.