Horatio Walpole, 4th Earl of Orford (24 September 1717 – 2 March 1797) — also known as Horace Walpole — was an English 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 his Gothic novel, The Castle of Otranto (1764) and his Letters, which are of significant social and political interest.