John Keats and Percy Bysshe Shelley were two of the most influential Romantic POETS of the 19th century. They are often referred to as the 'Odists' due to their focus on odes, which are lyrical poems that express strong emotion. They are also known as 'POETS' due to their prolific writing of poetry. Both Keats and Shelley wrote extensively about nature, love, and mortality, and their works have had a lasting impact on literature.