Historical Archive of the City of Cologne up at the site of the collapse (a large hole in the ground), where around 95% of all archival items could be held until August 2011, albeit scattered and in many cases badly damaged. Archive repositories all over Germany offered space to store the damaged and only roughly cleaned documents: wet materials were flash-frozen to prevent mold growth. "Itinerant archivists" worked in the receiving archives all over the country and began the task of re-identifying and re-cataloging. A newly installed centre for restoration and digitization on the outskirts of Cologne started working in 2011, with a total cost for restoring
History of the Jews in Cologne archbishop vacant, but Charles IV was not near enough to take action. On 23–24 August the relative security of Jews in Cologne came to an end. The Jews, who had already faced slaughter in the surrounding territories, were now also killed in Cologne itself. The actual outcome of the pogrom is not well known. In the course of St. Bartholomew's Night in 1349 the Jewish quarter near the town-hall ("Rathaus") was attacked, after which killing, plundering of Jewish properties, and arson followed. Fugitives were pursued and struck down. Though partly contradictory of each other, many sources testify to the calamity.