William Butler Yeats (pronounce /ˈjeɪts/; 13 June 1865 - 28 January 1939) was an Irish poet and dramatist, and one of the foremost figures of 20th-century literature. A pillar of both the Irish and English literary establishments, in his later years Yeats served as an Irish Senator for two terms. He was a driving force behind the Irish Literary Revival, and together with Lady Gregory and Edward Martyn founded the Abbey Theatre, and served as its chief during its early years. In 1923, he was awarded a Nobel Prize in Literature for what the Nobel Committee described as "inspired poetry, which in a highly artistic form gives expression to the spirit of a whole nation;" and he was the first Irishman so honored. Yeats is generally considered one of the few writers whose greatest works were completed after being awarded the Nobel Prize; such works include The Tower (1928) and The Winding Stair and Other Poems (1929).