Following the rediscovery of Nazi looted work in an Argentinian home, Alexander Herman asks how the art market can sufficiently root out toxic provenance

Alexander Herman asks if export rules set up three-quarters of a century ago can still be fit for purpose

Aside from its legal subject matter—a bewigged judge beating down a protestor—what are the legalities of this whole affair?

Could the Manhattan district attorney's seizures be putting people off sending artworks to the city?