The Castle of Otranto,

Horatio Walpole, 4th Earl of Orford (24 September 1717 – 2 March 1797), also known as Horace Walpole, was an English writer, art historian, man of letters, antiquarian and Whig politician.

He had Strawberry Hill House built in Twickenham, south-west London, reviving the Gothic style some decades before his Victorian successors. His literary reputation rests on the first Gothic novel, The Castle of Otranto (1764), and his Letters, which are of significant social and political interest. They have been published by Yale University Press in 48 volumes.

He was the son of the first British Prime Minister, Sir Robert Walpole. As Horace Walpole was childless, on his death his barony of Walpole descended to his cousin of the same surname, who was created the new Earl of Orford.

Source: Horace Walpole on Wikipedia.