Henry IV (Italian: Enrico IV) is an Italian play (Enrico IV) by Luigi Pirandello written in 1921 and premiered to general acclaim at the Teatro Manzoni in Milan on 24 February 1922. A study on madness with comic and tragic elements, it is about a man who believes himself to be Henry IV, Holy Roman Emperor. It has been translated into English by Tom Stoppard, among others. Rex Harrison starred in a noted British production which went to Broadway in 1973, though the Stoppard translation was not used in the production. In 2019, it was ranked by The Independent as one of the 40 greatest plays ever written. (wikipedia.org)