The Lisbon Traviata revolves around fans of the soprano who was of Greek-American nationality.
 It revolves around several opera fans, especially of the opera singer Maria Callas, and their gay relationships. 
Maria Callas, Commendatore OMRI (Greek:   ; December 2, 1923 September 16, 1977), was a Greek-American soprano, and one of the most renowned and influential opera singers of the 20th century. 
