What opera that starred William Martin was based on a play written by William Shakespeare?
William Martin (tenor):  In 1930 he sang Romeo to Grace Moore's Juliette in Gounod's "Roméo et Juliette" at the Opéra Royal de Wallonie. Roméo et Juliette: Roméo et Juliette ("Romeo and Juliet") is an opera in five acts by Charles Gounod to a French libretto by Jules Barbier and Michel Carré, based on "The Tragedy of Romeo and Juliet" by William Shakespeare.
Roméo et Juliette