Rich melodic works in classical imagery of British poet John Keats include " The Eve of Saint Agnes ," " Ode on a Grecian Urn ," and " To Autumn ," all in 1819. Work of the principal of the Romantic movement of England received constant critical attacks from the periodicals of the day during his short life. He nevertheless posthumously immensely influenced poets, such as Alfred Tennyson. Elaborate word choice and sensual imagery characterize poetry, including a series of odes, masterpieces of Keats among the most popular poems in English literature. Most celebrated letters of Keats expound on his aesthetic theory of "negative capability." Wikipedia page of the author