The Irish poet William Butler Yeats was awarded the Nobel Prize in Literature in 1923. He is widely considered to be one of the greatest poets of the 20th century and is known for his exploration of themes such as love, loss, and the complexities of life. Yeats was a major figure in the Irish Literary Revival and was a driving force behind the establishment of the Abbey Theatre in Dublin. His works include 'The Lake Isle of Innisfree, ' 'The Second Coming, ' and 'Sailing to Byzantium.'