In its early years, the theatre was closely associated with the writers of the Irish Literary Revival, many of whom were involved in its founding and most of whom had plays staged there. The Abbey served as a nursery for many of the leading Irish playwrights and actors of the 20th century, including William Butler Yeats, Augusta, Lady Gregory, Sean O'Casey and John Millington Synge. In addition, through its extensive programme of touring abroad and its high visibility to foreign, particularly American, audiences, it has become an important part of the Irish tourist industry.