Cultural artefacts are enriched when displayed in the context from which they originated  Cultural treasures should be displayed in the context in which they originated; only then can they be truly valued and understood. In the case of the Parthenon marbles this is an architectural context which only proximity to the Parthenon itself can provide. In the British Museum they appear as mere disconnected fragments, stripped of any emotional meaning. It may also be useful for academics to have a cultural property in its original context in order to be able to understand it, for example a carved door may be a beautiful artefact but it cannot be truly understood unless we know what the door was used for, where it leads too something for which it is necessary to see the context.  Cultural and historical tourism is an important source of income for many countries, and is especially important for developing countries. If their artefacts have been appropriated by foreign museums in wealthy nations then they are being deprived of the economic opportunity to build a successful tourist trade. Both the treasures themselves are being devalued as is the experience of seeing the treasures.