The Eve of St. Agnes is a Romantic narrative poem of 42 Spenserian stanzas set in the Middle Ages. It was written by John Keats in 1819 and published in Lamia, Isabella, The Eve of St. Agnes, and Other Poems. The poem was considered by many of Keats's contemporaries and the succeeding Victorians to be one of his finest and influenced subsequent 19th-century literature. (Wikipedia, CC BY-SA 4.0)