William Wordsworth (7 April 1770 – 23 April 1850) was a major English Romantic poet who, with Samuel Taylor Coleridge, helped to launch the Romantic Age in English literature with the 1798 joint publication "Lyrical Ballads". Wordsworth's magnum opus is generally considered to be "The Prelude", a semi-autobiographical poem of his early years which he revised and expanded a number of times. It was posthumously titled and published, prior to which it was generally known as "the poem to Coleridge".