On screen
Cast
15 credited performers
Niall MacGinnis
Martin Luther
Artwork unavailable
John Ruddock
Vicar von Staupitz
Artwork unavailable
Pierre Lefevre
Spalatin
Artwork unavailable
Guy Verney
Melanchthon
Alastair Hunter
Carlstadt
David Horne
Duke Frederick
Fred Johnson
Prior
Philip Leaver
Pope Leo X
Heinz Piper
Dr. Eck
Artwork unavailable
Leonard White
Emissary
Artwork unavailable
Egon Strohm
Cardinal Alexander
Annette Carell
Katherine von Bora (as Annette Carrell)
Alexander Gauge
Tetzel
Henry Oscar
Character not listed
Irving Pichel
Brueck