Central Zionist Archives

The Central Zionist Archives (CZA; Hebrew: הארכיון הציוני המרכזי) is the official archives of the institutions of the Zionist Movement: the World Zionist Organization, the Jewish Agency, the Jewish National Fund, and Keren Hayesod/the United Israel Appeal as well as the archives of the World Jewish Congress. The CZA preserves the files created in the course of the activities of these bodies and the secondary bodies created by them. In addition, the Central Zionist Archives holds the files of the institutions of the Jewish population in Palestine before the establishment of the State of Israel.

More information on the Wikipedia page