P.B. Shelly wrote a famous elegy in memory of Keats

Editor and critic Leigh Hunt introduced P.B. Shelley and John Keats in 1916. The two are said to have a cordial civil relationship that doesn't go any farther. Hunt claims that Keats did not view Shelley with the same kindness that Shelley did. Despite this, Keats and Shelley corresponded via letters after Shelley and his wife relocated to Italy, and when Keats became unwell, Shelley extended an invitation for him to stay with him in Pisa. However, Keats passed away in Rome in February 1921.

Shelly was devastated to learn of Keats' passing. He believed that the vicious criticisms of Keats in the "Quarterly Review" had hastened the poet's demise. As a result, he wrote an elegy to Keats in the pastoral style, referring to it as "the image of my sadness and honor for poor Keats." Adonais, which Shelley wrote roughly seven weeks after Keats passed away, is regarded as one of his best poems and, in the poet's own words, is the "least defective" of all of his compositions. It is a highly wrought piece of art, possibly greater in point of composition than anything I have written, Shelley wrote about the poem in June 1821.