The world's Reform congregations are united in the World Union for Progressive Judaism founded in 1926, with constituents or representatives in 26 countries. Three rabbinical seminaries, in London, Paris, and the Hebrew Union College - Jewish Institute of Religion (with campuses in Cincinnati, New York, Los Angeles, and Jerusalem), train the rabbis of the movement. A fourth, the Berlin Hochschule fuer die Wissenschaft des Judentums, founded in 1872, was a victim of the Holocaust. In general, the modern rabbinical seminaries of all Jewish schools of thought that apply scientific methods to the study of traditional sources are a result of the early Reform strivings for a synthesis of tradition and modern knowledge.