As the Prussian Palace made its grand opening of a museum on Wednesday, the debate on the return of artifacts plundered from abroad has reached its boiling point. The Humboldt Forum will exhibit 20,000 treasures from Africa, Asia and Oceania, mostly from the former colonies. Among the prized artifacts being displyed is the Benin Bronzes, which Nigeriaâs ambassador to Germany, Yusuf Tuggar, has formally demanded their resitution. The Benin Bronzes are hundreds of metal plaques and sculptures that decorated the royal palace of the Kingdom of Benin in the 16th and 18th centuries. But they were lootted by the British in the 19th centry and are now scattered across European museums.