"The Tower" is the first major collection of poems by W. B. Yeats as a Nobel laureate poet, after being awarded in 1923. It is considered one of his most influential collections. The title refers to Thoor Ballylee Castle, a Norman tower that Yeats purchased in 1917 and later restored. The collection includes some of his greatest and most innovative poems, such as "Sailing to Byzantium", a lyrical meditative approach to man's disillusionment with the natural world; "Leda and the Swan", a violent and graphic approach to the Greek myth of Leda and Zeus, and "Among School Children", a poetic consideration of life, love, and the creative process.