Writing

2019		The Bleeding Nun … Writer
2019		I Vespri Siciliani … Writer

2018		Opéra National de Paris: Meyerbeer's Les Huguenots … Writer
2018		The Metropolitan Opera: The Elixir of Love … Original Story

2014		Donizetti: L'Elisir d'Amore … Original Story
2014		Marco Spada … Writer

2013		L'Africaine … Writer
2013		Les Vêpres siciliennes … Original Story
2013		Le comte Ory … Writer

2012		Robert le Diable … Writer
2012		The Metropolitan Opera: Un Ballo in Maschera … Original Story
2012		Donizetti: L'elisir d'amore … Original Story

2011		Un ballo in maschera … Original Story
2011		Le comte Ory … Writer

2010		I vespri siciliani … Original Story
2010		Adriana Lecouvreur … Original Story

2009		Bellini: La Sonnambula … Original Story
2009		L'Elisir d'Amore … Original Story

2006

… Original Story

2003

… Writer

2001

… Original Story

1997

… Original Story

1991		L'Elisir d'Amore … Original Story
1991		Un Ballo in Maschera … Original Story

1990		Meyerbeer: Les Huguenots … Writer
1990		I vespri Siciliani … Original Story

1989

… Original Story

1988

… Writer

1986

… Writer

1985

… Writer

1981

… Original Story

1980

… Original Story

1979

… Original Story

1975

… Original Story

1965

… Writer

1947

… Novel

1938

… Theatre Play

1931

… Story

1929		Devil-May-Care … Theatre Play
1929		Der schwarze Domino … Story

1928

… Theatre Play

1923

… Theatre Play

1918		Die Jüdin … Story
1918		Álarcosbál … Story

1916

… Opera

1913

… Theatre Play

1912

… Story