Leading English art critic John Ruskin (1819-1900) was hugely influential in the latter half of the 19th century; from the 1850s he championed the Pre-Raphaelites, who were influenced by his ideas. William Morris (1834-1896), founder of the Arts and Crafts Movement, emphasised the value of traditional craft skills which seemed to be in decline in the mass industrial age. His designs, like the work of the Pre-Raphaelite painters with whom he was associated, referred frequently to medieval motifs. English narrative painter William Powell Frith (1819-1909) has been described as the "greatest British painter of the social scene since Hogarth", and painter and sculptor George Frederic Watts (1817-1904) became famous for his symbolist work.