Radiant Fold (…the Illuminating Gas) is major installation by Cerith Wyn Evans commissioned for Amgueddfa Cymru – National Museum Wales through the Contemporary Art Society’s Great Works scheme. The installation references Marcel Duchamp’s iconic work The Bride Stripped Bare by Her Batchelors, Even (1915–23). The four neon forms are visual quotations from the mysterious optical diagrams that Duchamp called ‘the occultist witnesses’. Made specifically for Gallery 24 in the Museum’s West Wing, the work creates an interface with the space’s modernist architecture and the wider history of the Museum and its collections. Cerith Wyn Evans was born in Llanelli in 1958. Since the 1990s his work has focuses on sculpture and installation that explores our understanding of language and perception. His work has featured in numerous international group and solo exhibitions including a major commission for Tate Britain’s Duveen Galleries in 2017. The Great Works scheme is generously supported by Sfumato Foundation and aims to tackle the absence in UK museums of works by major British artists of the last 20 years. Radiant Fold (…the Illuminating Gas) is the first work by Cerith Wyn Evans to enter a public collection in Wales.