sentences:  Numerous 20th-century compositions were written in the vein of the 19th-century Romantic concertos - and often using its forms and styles - including concertos by Sergei Rachmaninoff (four piano concertos, 1890–1926), Jean Sibelius (violin, 1903), Edward Elgar (violin 1909–10, cello 1919), Carl Nielsen (violin, flute, clarinet), Sergei Prokofiev (five for piano, 1911–32; two for violin 1916-17 and 1935), William Walton (viola, violin, cello), Dmitri Shostakovich (two each for piano, violin, and cello), and Francis Poulenc (organ).The virtuoso tradition mirrored in these concertos is also obvious, though in radically original guise, in the concertos of Béla Bartók.Rachmaninov, Prokofiev and Bartók were all piano virtuosos.