Wapenbord van Eduard IV, koning van Engeland (1442-1483), in zijn hoedanigheid van ridder in de orde van het Gulden Vlies

Pierre Coustain was the official painter to the Burgundian court under Philip the Good and Charles the Bold, responsible among other things for the heraldic and ceremonial painting that sustained court ritual. This armorial panel documenting Edward IV of England's membership in the Order of the Golden Fleece — the Burgundian chivalric order — dates from around 1468, when Edward was inducted into the Order as part of the diplomatic rapprochement between England and Burgundy. The panel functioned as a permanent heraldic record in the chapter's registers, and Coustain's execution reflects his professional expertise in the precise rendering of heraldic device.

Coustain employs the precise, declarative technique appropriate to heraldic work: flat, saturated colour fields within clean contours, gilded devices, and the controlled rendering of the Order's insignia. The panel prioritises legibility and heraldic accuracy over pictorial invention. Craftsmanship is high — the gold tooling and colour application are of the standard expected of a court painter executing an official document.