Shield of Jacob of Luxemburg (after 1441-1488), Lord of Fiennes, in his capacity as knight of the Order of the Golden Fleece

Pierre Coustain's Shield of Jacob of Luxembourg, Lord of Fiennes, in his capacity as Knight of the Order of the Golden Fleece, painted around 1481 and now in the Rijksmuseum, is an heraldic panel recording the arms of Jacob of Luxembourg following the custom of the Order of the Golden Fleece — the most prestigious chivalric order in Europe, founded by Philip the Good of Burgundy in 1430. Knights of the Golden Fleece had their coats of arms painted and hung in the choir of the church where the order's chapters were held, creating a cumulative visual record of the order's membership.

Oil on panel executed with the precision required of heraldic painting — exact rendering of coats of arms, tinctures, divisions, and charges following strict heraldic rules. The shield of Luxembourg is depicted with the knight's arms, the Golden Fleece collar, and appropriate heraldic accessories.