- Unknown:
- E. Raupach
- Chorus-Master:
- Andrea Morosini
- Conducted By:
- Vittorio Gui
- Henry VI. Emperor of Hohenstaufen,son of Frederick Barbarossa (bass):
- Juan Giacomo Guelfi
- Irmengarde Countess Palatine (soprano):
- Dorothy Dow
- Agnes, her daughter (soprano):
- Lucille Udovick
- Henry the Lion, Duke of Saxony,leader of the Guelf (baritone):
- Anselmo Colzani
- Henry of Brunswick, his son (tenor):
- Franco Corel
- Philip of Hohenstaufen, brother of the Emperor (tenor):
- Francesco Albanese
- The Duke of Burgundy (Philip Augustus, King of France) (baritone):
- Enzo Maseherini
- The Archbishop of Magonza (bass):
- Arnold van Mille
- Theobald, an envoy of the Guelfl (tenor):
- Valiano Natali
- The Lord of the Castle (bass):
- Georgio Algorta
- A herald (bass):
- Valerio Meucci
