John Nash 1752-1835, Architect. He designed much of the layout of Regency London, including Regent Street and Regent's Park, and many exceptional buildings, such as the remodelling of Buckingham Palace and the Royal Mews, and relocation of Marble Arch. In St. James's, his works include Carlton House Terrace, Clarence House, The Theatre Royal, and the former United Services Club, Pall Mall. John Nash supervised the design and layout of the St James's Square gardens including this pavilion, known as the Nash Summer House.