The Castle of Otranto
First published in 1764, Horace Walpole's 'The Castle of Otranto' is widely considered the foundational work of the Gothic novel genre. The story concerns Prince Manfred of Otranto, whose son Conrad is mysteriously crushed by an enormous helmet on his wedding day—a supernatural event that sets in motion a cascade of dark secrets, impossible omens, and moral transgressions. Written as a response to what Walpole saw as the constraints of contemporary fiction, this groundbreaking work blends medieval romance with psychological terror and the uncanny.