Nash, John, 1752–1835, English architect; pupil of Sir Robert Taylor. After enjoying an extensive practice in Wales, he began to work c.1792 in London. His capacities were greatest in town planning, and he is chiefly known for his boldly planned development of the Marylebone region of London. His scheme, as put into execution in 1818, comprehended Regent St., with its Quadrant, and Regent's Park, with its terraces and surrounding streets of formally designed town houses. Nash also designed the Haymarket theater and remodeled Buckingham Palace. He was one of the initiators of the neoclassic Regency style.
See studies by Sir John Summerson (2d ed. 1950) and T. Davis (new ed. 1968, repr. 1973).