John Robartes (1686 – 15 July 1757) was the 4th Earl of Radnor and contemporary and neighbour of Alexander Pope and Horace Walpole.

He was the son of Francis Robartes and his second wife Lady Anne, was the widow of Hugh Boscawen of Tregothnan, and daughter of Wentworth Fitzgerald, 17th Earl of Kildare.

[4] Some observers conjecture that Walpole was piqued by his neighbour's anticipation of his own architectural ambitions, as this pre-dated his embellishment of Strawberry Hill House.

[6] Inside the house, Robartes built a collection of artworks, including Canaletto's The Old Horse Guards from St James's Park now owned by the Andrew Lloyd Webber Foundation.

He bequeathed the house and much of his art collection to his steward, Frederick Atherton Hindley, the Canaletto and Hobbema to James Harris and two Scott paintings to Richard Owen Cambridge.