The Open Air Theatre The Ironworks, Inner Circle, Regent’s Park London The Open Air Theatre in London was founded in 1932 and is the oldest open-air theatre which is run by professional actors in the world. Over 120,000 people visit this theatre each year, and it is famous for its Shakespeare performances, in particular Midsummer Night’s Dream, which are held at the theatre. Musicals and children’s performances are also hosted at the Open Air Theatre. It has a 1,240-seat auditorium and picnic area. London Guide | Theatres in London Leave a Reply Cancel Reply Your email address will not be published.CommentName* Email* Website Save my name, email, and website in this browser for the next time I comment.