Religion: Christian (medieval) 
Name: Duke of Darnham
Classification:
supporting character
Publisher(s): 
First Appearance: Batman (vol. 1) #172 (June 1965): "Attack of the Invisible Knights!"
Creators: John Broome, Sheldon Moldoff, Joe Giella
Number of Appearances: 1
Enemy of: Baron of Ealing
Occupation: aristocrat
Nation: England, United Kingdom
Gender: male
Note: lived 800 years ago
The Duke of Darnham was apparently a strong religious believer. In panel 4 on page 2 the museum guide is recounting the story of the Duke of Darnham. The Duke is shown talking to his knights, telling them, "The soothsayer has prophesied that unless the Black Opals of Ealing are destroyed, my family will be forever cursed! I charge ye -- go to Ealing and destroy the jewels!"
Batman (vol. 1) #172 (June 1965): "Attack of the Invisible Knights!" (1-panel cameo)
Suggested links for further research about this character and the character's religious affiliation:
- https://www.comics.org/issue/19201/
- http://comicbookdb.com/issue.php?ID=106949