Bertin Duval was a stained-glass painter active in Normandy during the sixteenth century, with documented work in Alençon. He forms part of the regional tradition of Norman Renaissance glass, which developed from the late medieval workshops of the fifteenth century while absorbing new artistic influences derived from print culture and classical models.

Duval’s windows are characterised by clear narrative organisation, carefully articulated figures, and the continued use of strong lead lines, reflecting the persistence of Gothic workshop practice. At the same time, his figures increasingly display Renaissance traits, including more naturalistic proportions, classical drapery types, and architectural framing influenced by contemporary engravings. This combination situates Duval within the broader transformation of French stained glass during the first half of the sixteenth century.

Working in a regional centre rather than a major metropolitan hub, Duval’s production illustrates how Renaissance forms were adapted within provincial workshops. His glass demonstrates continuity with earlier Norman traditions while responding to changing tastes and iconographic expectations, particularly in parish and collegiate church ⓘ settings. Through this synthesis, Bertin Duval contributes to the distinctive character of sixteenth-century stained glass in Normandy.