Romanticism was a reaction against Neoclassicism that valued individualism and emotion over reason and order. It originated in the late 18th century and emphasized feelings, imagination, and nature. Key artists of the movement included J.M.W. Turner, Caspar David Friedrich, John Constable, and William Blake. Their works often depicted landscapes, seascapes, and themes of solitude to express the ideals of freedom and mystery prized by Romanticism.