Searching for traces of Hans-Hasso von Veltheim – On https://www.dhm.de/blog/2023/05/26/searching-for-traces-of-hans-hasso-von-veltheim-on-the-composite-survey-of-collections-in-the-provenance-research-of-the-dhm/
Hans-Hasso von Veltheim was born in Cologne in 1885