 Among the best known are violinists Jascha Heifetz, David Oistrakh, Leonid Kogan, Gidon Kremer, and Maxim Vengerov; cellists Mstislav Rostropovich, Natalia Gutman; pianists Vladimir Horowitz, Sviatoslav Richter, Emil Gilels, Vladimir Sofronitsky and Evgeny Kissin; and vocalists Fyodor Shalyapin, Mark Reizen, Elena Obraztsova, Tamara Sinyavskaya, Nina Dorliak, Galina Vishnevskaya, Anna Netrebko and Dmitry Hvorostovsky.During the early 20th century, Russian ballet dancers Anna Pavlova and Vaslav Nijinsky rose to fame, and impresario Sergei Diaghilev and his Ballets Russes' travels abroad profoundly influenced the development of dance worldwide.Soviet ballet preserved the perfected 19th-century traditions, and the Soviet Union's choreography schools produced many internationally famous stars, including Galina Ulanova, Maya Plisetskaya, Rudolf Nureyev, and Mikhail Baryshnikov.