![Visitors in the room where the Parthenon marbles are displayed, in the British Museum, last December.](https://imagenes.elpais.com/resizer/v2/NSMZLCUW2VBJRLUZA5WG5YD33Q.jpg?auth=9e84d32ffadd2f0fb6403856e4341191f31fe8b76f752eabaa3d1cab97091733&width=414&height=233&smart=true)
Museums in Europe and the United States confront their colonial past
Many countries have begun to return pieces that were looted during periods of colonization. Experts are also researching the origins of stolen collections. Some parties, however, have resisted coming to agreements