 Like her, he was widowed, and their relationship moved on to the point at which they moved together to a new home in Rangsdorf, just outside Berlin on its south side.Hintze retained his Berlin apartment and they were therefore able to keep in touch with city life and became frequent visitors to the university where they were able to attend lectures on subjects that interested them.Towards the end of her life Ingeborg Euler was diagnosed with inoperable cancer.