The group, which included historians, writers, rabbis, and social workers, was dedicated to chronicling life in the Ghetto during the German occupation.

After the war, two of the three caches were recovered and today the re-discovered archive, containing about 6,000 documents (some 35,000 pages),[1] is preserved in the Jewish Historical Institute, Warsaw.

The members of Oyneg Shabbos initially collected the material with the intention that they would write a book after the war about the horrors they had witnessed.

As the pace of deportations increased, and it became clear that the destination was the Treblinka death camp and few Jewish Varsovians were likely to survive, Ringelblum had the archives stored in three milk cans and ten metal boxes, which were then buried in three places in the Ghetto.

The third cache was thought to be buried beneath what is now the Chinese Embassy in Warsaw[7] but a search in 2005 failed to find the missing archival material.

In 2019, a documentary film directed by Roberta Grossman about the Ringelblum Archive, based on Kassow's book Who Will Write Our History?, was released.