In 1999, a year after the death of her mother Sylvia in London, and after long consideration, and family discussion, in which the London Leo Baeck Institute, a Jewish archive, was also thought to be an appropriate location to house the personal effects of the Ury/Unger archive, Tanya Ury entrusted the family archive to the Historical Archives in Cologne, Germany, where she has been living since 1993 and which was the hometown for many family members of previous generations; it was to be a gesture of reconciliation and trust towards Germany, to return these documents, letters, photographs and other objects from several generations of this German-Jewish family of artists and business people, who had experienced persecution, annihilation or exile at the hands of the Nazis.

The fall of the Historical Archives in Cologne still remains unexplained but is probably due to earth movement resulting from underground building works in the vicinity of the new North-South-Tramline. The collapse awakens memories of a monumental historical catastrophe.