Pique Dame, Op. 68 (in two volumes with Russian / German libretto)
Iolanta, lyric opera in one act
Der Woywode (full opera score in three volumes with Russian libretto)
Mazepa (in three volumes with German /Russian libretto)
Die Bergknappen, National Singspiel in one act in four scenes (full opera score with German libretto)
La Strada op. 45. Opera in two acts and a prologue after Fellini’s film (Libretto: Eric de Kuyper) 2008 (printed in large format)
I due Foscari (in two volumes with Italian libretto)
I due Foscari, lyric tragedy in three acts (Vocal score with Italian libretto)
Das Liebesverbot
Die Feen
Rienzi (in three volumes)
Die Hochzeit (The Wedding)
Rienzi (Vocal Score with German libretto)
Die Feen, romantic opera in three acts (Klavierauszug mit deutschem Libretto)
Der Bärenhäuter
Der Bärenhäuter (Vocal score with German libretto)
Oberon
Peter Schmoll und seine Nachbarn
Euryanthe
Silvana
Euryanthe (Klavierauszug mit deutschem Libretto)
Abu Hassan (Vocal Score with German libretto)
Oberon (Romantic opera in three acts) / Vocal Score with German libretto
Abu Hassan
Der Protagonist Op. 15 (1925) (complete opera score in one act with German libretto by Georg Kaiser)
Kain und Abel Op. 54 (vocal score with German libretto)
Kain und Abel Op. 54 (with German libretto)
Der Corregidor
Der Corregidor (Vocal Score with German libretto)
Eine florentinische Tragödie Op. 16 (with German libretto)
Eine florentinische Tragödie Op. 16 (Vocal Score with German libretto)