What happens when a large portion of your country’s archaeological treasures are “owned” by another country that stole them? That’s the position non-western nations around the world find themselves in, with most of their cultural heritage residing in European and U.S. museums—but especially London’s British Museum.

Take Nigeria, for example. In 1897, British troops stole some 4,000 sculptures after invading the Kingdom of Benin (now southwestern Nigeria). Over a century later, surviving bronzes are on display at museums in the United Kingdom, Germany, Austria and the United States, but not in Nigeria, their country of origin. The 2018 film Black Panther nodded to this issue during a heist scene set in the fictional “Museum of Great Britain” where characters reclaimed artifacts stolen from the African country of Wakanda (also fictional).

Nigeria has been asking the U.K. to return its Benin bronzes for decades, and in late 2018, the countries struck a deal in which the British Museum will send some bronzes to Nigeria for the Royal Museum the country plans to open in 2021. But crucially, the British Museum says it is only loaning the sculptures—it still expects Nigeria to return the goods that Britain stole.

Around the same time as the British Museum announced that it will loan Nigeria its own artifacts, a protest theatre group called “BP Or Not BP?” organized a “Stolen Goods Tour” at the British Museum. The tour highlighted artifacts like the Gwaegal shield, which the British stole from Aboriginal Australians in the late 18th century. Similarly to the Benin bronzes, the British Museum refused to repatriate the Gwaegal shield to Australia for a 2016 museum exhibit. Instead, the British Museum loaned the shield and reclaimed it afterward.

The list of stolen artifacts the British Museum refuses to give up goes on and on. Egypt wants its Rosetta Stone back and Easter Island has asked the museum to return its Moai head statue. Even Greece, a fellow member of the E.U., wants the museum to return some Parthenon marbles that are often called the “Elgin marbles” after the Scottish nobleman who took them.

Of all the European countries with stolen artifacts, France has been the most responsive to calls for repatriation. French President Emmanuel Macron has announced that the Quai Branly Museum in Paris will return 26 stolen objects to the country of Benin (not to be confused with Nigeria’s former Kingdom of Benin). He has also said he wants to change French law so that France must return stolen objects whenever a country asks for them back.

In contrast, the British Museum has specifically said that it has no plans to repatriate stolen artifacts. In response to the Quai Branly Museum's return of 26 items, British Museum Director Hartwig Fischer told The New York Times that “the collections have to be preserved as whole.” The pressure to return them, however, will likely continue.