Drama originated and flourished in England during the 16th-17th centuries under playwrights like Shakespeare who wrote in verse. Historical plays during this period enhanced the image of English monarchy. Authors also drew from Greek/Roman mythology and plays. In the 19th century, Ibsen's works revolutionized drama with realism while Brecht's in the 20th century incorporated formal experimentation and social critique, influencing many modern playwrights. Other important modern playwrights included Chekhov, O'Neill, Pirandello, Beckett, and Pinter.