Castle Sinister, 1938 - "Castle Sinister" is a fictional gothic mansion first introduced in the comic book series, "The Spirit," by Will Eisner, published in 1940. Set in the fictional Central City, the castle serves as the hideout for various villains and is often associated with supernatural events and intrigue. The initial appearance of Castle Sinister was in the comic dated 1938, marking its debut in American pop culture. Its mysterious aura and connections to dark themes have made it an enduring icon within the genre. This summary does not imply any affiliation or endorsement of the work by the author or any related parties.