They have a unique connection with the place where they were produced and are an essential part of the cultural history of that area. That link should be honoured by returning the artefacts to the place where they were originally made and used.
Why museums should return artifacts to their country of origin?
Returning the world's artefacts is a good opportunity to strengthen the heritage capacities of those countries looted during colonisation.
Why should artifacts belong in museums?
Museums are great sources of cultural, historical and educational heritage, attracting 850 million visits total worldwide each year. A museum's ultimate defense for possessing artifacts, even illegal ones, is that they have the duty and responsibilities to display the valuable objects.