The National Museums & Galleries of Wales (NMGW) is an independent chartered body and a registered charity funded by the Welsh Assembly Government for the advancement of education of the public. NMGW develops, cares for, studies and encourages access to its collections for the benefit of society in perpetuity.

NMGW currently operates museums in six locations across Wales: National Museum & Gallery in Cathays Park, Cardiff (NMG); Museum of Welsh Life in St Fagans, Cardiff (MWL); Roman Legionary Museum in Caerleon, Newport; Welsh Slate Museum in Llanberis, Gwynedd; Museum of the Welsh Woollen Industry in Dre-fach Felindre, Carmarthenshire; and Big Pit National Mining Museum of Wales in Blaenafon,Torfaen.

Future proposals include the development of the National Waterfront Museum, Swansea and the National Conservation & Access Centre (currently the Collections Centre in Nantgarw, Rhondda Cynon Taf).