Karl Wilhelm Friedrich Schlegel was a German poet, literary critic, philosopher, philologist, and Indologist. With his older brother, August Wilhelm Schlegel, he was one of the main figures of Jena Romanticism.

A genre of arts criticism, literary criticism or literary studies is the study, evaluation, and interpretation of literature. Modern literary criticism is often influenced by literary theory, which is the philosophical analysis of literature's goals and methods. Although the two activities are closely related, literary critics are not always, and have not always been, theorists.