Nathan Alterman, the Israeli poet, was born in Warsaw, as was Moshe Vilenski, the Israeli composer, lyricist, and pianist, who studied music at the Warsaw Conservatory. Russian Jewish poet and essayist Osip Mandelstam, one of the foremost members of the Acmeist school of poetry was born in Warsaw while it was part of the Russian Empire. Other notables include Samuel Goldwyn, the founder of Goldwyn Pictures, mathematician Benoit Mandelbrot, physicist Joseph Rotblat, biochemist Casimir Funk, and Moshe Prywes, an Israeli physician who was the first President of Ben-Gurion University of the Negev. Warsaw was the beloved city of Isaac Bashevis Singer, which he described in many of his novels: "Warsaw has just now been destroyed. No one will ever see the Warsaw I knew. Let me just write about it. Let this Warsaw not disappear forever", he wrote. Notable sportspeople born in Warsaw include footballer Robert Lewandowski and tennis player Iga Świątek.