Castle of Otranto (Czech: Otrantský zámek) is a 1977 Czechoslovak animated short film by Jan Švankmajer.

A television reporter, Miroslav Frýba, interviews Vozáb, who tells him about his research and the story of the book.

It starts with Conrad, the son of Lord Manfred, being crushed by a giant helmet on his way to his wedding with Isabela.

Manfred is devastated by the fact that he has lost his only heir and decides to marry Isabela himself, which horrifies her and she runs away.

When Vozáb finishes his talk Frýba begins to question the possibility of supernatural elements being part of the story but suddenly grit and pieces of stone start to fall from the castle and the giant knight's hand (Karel Chocholin) is seen on the top of a tower as the film ends.