This study outlines the activities of Nella Rost and her Jewish historical commission in Stockholm (1946–1951) and shows the challenges and difficulties of establishing a Holocaust archive in the immediate post-war period. Like most of the Jewish historical commissions and documentation centres in Europe, the one in Stockholm had only been active a few years before Rost left for Uruguay, which resulted in the archive later being dissolved. The chapter underlines the importance of an international Jewish context—including the presence of a new Yiddish culture among refugees and immigrants—for post-war memory of the Holocaust. The author furthermore argues that research within the field of memory studies should also take a closer look at unsuccessful initiatives to record and commemorate the past.