Welsh artefacts in museums outside Wales
Various artefacts originally found in or culturally important to Wales, are housed in museums outside the country, namely in England and France. Their housing outside of Wales has been controversial to some in Wales, calling for some artefacts to be repatriated (returned) back to Wales, while others argue Wales lacks the necessary museums and security for the artefacts to be housed in Wales safely.
Source: Wikipedia — Welsh artefacts in museums outside Wales (CC BY-SA 4.0)