 The Jewish population suffered greatly from pogroms in October 1905 and in March–April 1919; many Jews were killed or robbed at the instigation of the Russian nationalist Black Hundreds.When the Twersky Dynasty left Chernobyl in 1920, it ceased to exist as a center of Hasidism.Chernobyl had a population of 10,800 in 1898, including 7,200 Jews.