Founding (1905–1907) The National Museum of Wales was founded in 1905, with its royal charter granted by
King Edward VII on 19 March 1907. The 1907 Charter stated that the museum's purpose was to be achieved primarily by the complete illustration of the geology, mineralogy, zoology, botany, ethnography, archaeology, art, history and special industries of Wales. The establishment of the museum was part of a broader movement of Welsh cultural and educational institutions, coinciding with the founding of the
National Library of Wales, which received its Royal Charter on the same date. suggesting the formation of a National Museum of Wales, June 1876. Part of the bid for
Cardiff to obtain the National Museum for Wales included the gift of the Cardiff Museum Collection, then known as "Welsh Museum of Natural History, Archaeology and Art," which was formally handed over in 1912. The
Cardiff Museum had previously been sharing the building of Cardiff Library and was a sub-department of the library until 1893. The Foundation Stone was laid by
King George V on 26 June 1912. However, owing to the First World War, construction was significantly delayed and the museum did not open to the public until 28 October 1922, with the official opening ceremony taking place in 1927. The first directors to lead the institution were
William Evans Hoyle (1908–1924) and the renowned archaeologist
Sir Mortimer Wheeler (1925–1926), followed by
Sir Cyril Fox (1926–1948), who oversaw much of the museum's early development and expansion.
Network expansion (1940s–1960s) The museum began expanding beyond its Cardiff headquarters in the mid-20th century. The most significant expansion came with the establishment of St Fagans National Museum of History. The museum was founded in 1946 following the donation of
St Fagans Castle and its surrounding 18 acres of land by the
Earl of Plymouth. It opened to the public on 1 July 1948 under the name of the Welsh Folk Museum, becoming the first National
open-air museum within the United Kingdom. The concept was the brainchild of Welsh poet and museum curator
Iorwerth Peate, who was inspired by
Skansen, the outdoor museum of vernacular Swedish architecture in Stockholm. St Fagans' collections have their roots in the 'Welsh Bygones' gallery which opened at the National Museum in Cathays Park in 1926.
Modernisation and industrial heritage (1970s–1990s) By the early 1970s, the Museum had new exhibition galleries, offices and workrooms. Three new galleries were opened: the Gallery of Material Culture in 1970; the Agricultural Gallery in 1974; and the Costume gallery in 1976. By the 1980s, Wales' industrial communities were as threatened as the rural way of life had been in the 1940s. A change of direction was needed. In 1987, the Rhyd-y-car ironworkers' cottages from Merthyr Tydfil were relocated to St Fagans. This marked a significant shift in the museum's focus to include Wales's industrial heritage alongside its traditional rural collections. The network continued to grow with the establishment of specialist museums focused on Wales's industrial past, including the
National Slate Museum in Llanberis,
Big Pit National Coal Museum in Blaenavon, and the
National Wool Museum in Dre-fach Felindre.
Contemporary developments (2000–present) The 21st century has seen significant investment in the museum network. St Fagans underwent a six-year, £30-million revamp that was completed in 2018, and the museum was named the Art Fund Museum of the Year in 2019. This redevelopment included three new galleries showcasing Wales's history, improvements to buildings, and enhanced visitor facilities. In 2015, Amgueddfa Cymru - National Museum Wales agreed a new Vision, "Inspiring people, changing lives", to guide all future activities. The organisation has also undertaken significant rebranding, with the current logo introduced in August 2022. In October 2025, the museum launched its digital image library, Amgueddfa Cymru Images, offering free access to more than 2,000 images from the national collection, including photographs and images of objects reflecting Wales' social, industrial and natural heritage. along with images of artworks from its collection by
Van Gogh,
Monet and
Renoir. ==Museums and sites==