Baptismal font
Contributions to the development of science and technology have appeared since the beginning of the country's history. Baptismal font of Renier de Huy, is not the only example of medieval Walloon working expertise. An indication of that : the words "houille" (coal) or "houilleur" (coal miner) or "grisou" (damp) were coined in Wallonia and are from walloon origin.