Many artefacts resting in western museums were acquired illegally. Western states have a duty to retain them.  Artefacts were often acquired illegally. Elgin, for instance, appropriated the Parthenon Marbles from the Ottoman authorities who had invaded Greece and were arguably not the rightful owners of the site; he took advantage of political turmoil to pillage these ancient statues. Doubt has even been cast on the legality of the 1801 document which purportedly gave Elgin permission to remove the marbles [1] . The Axum obelisk was seized from Ethiopia by Mussolini as a trophy of war; fortunately the injustice of this action has since been recognised and the obelisk was restored to its rightful place in 2005 [2] .  UNESCO regulations initially required the return of artefacts removed from their country of origin after 1970,when the treaty came into force, but did not deal with any appropriations before this date due to deadlock in the negotiations for the framing of the convention that prevented inclusion of earlier removals. . However, the 1995 UNIDROIT Convention on Stolen or Illegally Exported Cultural Objects essentially removes the ambiguity about time limitations of UNESCO’s 1970 convention. Here, nations are required, in all cases, to return cultural artefacts to their countries of origin if those items were once stolen or removed illegally [3] . International law is thus on the side of returning artefacts.  [1] Rudenstine, David, 'Did Elgin cheat at marbles?' Nation, Vol. 270, Issue 21, 25 May 2000.  [2] BBC News, ‘Who should own historic artefacts?’, 26th April 2005,  [3] Odor, ‘The Return of Cultural Artefacts to Countries of Origin’.