His early works include a play about 16th century Anabaptists entitled It Is Written and another historically inaccurate play, Romulus the Great.  
In the middle of his career he turned to detective novels as seen in The Quarry and The Judge and His Hangman.  His early works include a play about 16th century Anabaptists entitled It Is Written and another historically inaccurate play, Romulus the Great.  Gottfried von Einem made an opera out of this man's The Visit of The Old Lady, which is in the same vein as his The Marriage of Mr. Mississippi.  FTP, name this Swiss writer best-known for his plays The Physicists and The Visit.
In the middle of his career he turned to detective novels as seen in The Quarry and The Judge and His Hangman.  
Friedrich Durrenmatt