I hope these international conventions at least partly answer your questions: - https://en.wikipedia.org/wiki/UNESCO_Convention_on_the_Means_of_Prohibiting_and

I hope these international conventions at least partly answer your questions: - https://en.wikipedia.org/wiki/UNESCO_Convention_on_the_Means_of_Prohibiting_and_Preventing_the_Illicit_Import,_Export_and_Transfer_of_Ownership_of_Cultural_Property https://en.wikipedia.org/wiki/UNESCO_Convention_on_the_Means... - https://www.unidroit.org/instruments/cultural-property/1995-convention https://www.unidroit.org/instruments/cultural-property/1995-...