Welsh costume is a central component of our national visual culture. Yet in terms of detailed scholarly research, very little attention has been paid to its origins and development. To date, most published material in this field has concentrated primarily on evidence found in 18th and early 19th century travelogues and prints which tend over-emphasise the unusual and the quaint. Although adult and children’s costumes have survived in museum collections, these specimens are difficult to date accurately and are often 20th century recreations produced for national pageants, fancy dress or folk dancing. Doliau is a partnership project to examine the establishment and development of Welsh national costume by studying 19th century dolls in public collections. The project aims to produce a catalogue of 19th century Welsh dolls in public collections in the UK making it available online, carry out research on those dolls to understand how they were made, create a bilingual terminology for describing them and create a publication and exhibitions. We also hope to train museums staff in specialist handling techniques. At the end of the project we will also know if there is more research possible on the collections. Once complete we hope that we will have established the research potential of 19 th century Welsh dolls as a component of the future study of Welsh costume, answered questions for the public on the origin and ‘true nature’ of Welsh costume, contributed to the understanding of the place of Welsh costume and the role of women in defining Welsh national identity and increased standards of care for historic dolls.