What do such anonymous private collections hide? Where is the transparency?
And do museum curators try to investigate such anonymous "collectors"? Or do they take the information on trust?
What does it say about the "due diligence" process?
Do museums investigate when questions are raised?
Detail of an Attic volute-krater showing a Dionysiac scene once in a Swiss "private collection" and featured in the Symes Dossier seized on Schinoussa (courtesy of Christos Tsirogiannis).