Past in Present.com Inc private historical archive.
This photograph came from unidentified historical archive collection. All items from that source are vintage, well preserved, high quality and historically significant. The archive came with a few printed pages that contained biography of Philipp Freiherr von Boeselager who was a German army officer known for his involvement in the 1944 plot to assassinate Adolf Hitler. After World War II, he pursued studies in economics and became a forestry expert. He also co-founded the Malteser Hilfsdienst, the medical service of the German Order of Malta, and coordinated German pilgrimages to Lourdes.
So we can cautiously assumed that this photograph came from his collection, but provenance require further research.