Vert (heraldry) medieval figurative art. The Anglo-Norman "prose Brut" (c. 1200) has Brutus of Troy bear a green shield, "Brutus Vert-Escu, Brutus Viride Scutum". Green is occasionally found in historical coats of arms (as opposed to the fictional "green knights" of Arthurian romance) from as early as the 13th century, but it remained rare, and indeed actively avoided, well into the 15th century, but becomes more common in the classical heraldry of the 16th and 17th centuries. An early example of a green escutcheon was that of the coat of arms of Styria, based on the banner of Ottokar II of Bohemia
Ecclesiastical heraldry depiction of the galero in arms can vary greatly depending on the artist's style. The top of the hat may be shown flat or round. Sometimes the brim is shown much narrower; with a domed top it can look like a cappello romano with tassels, but in heraldry it is still called a galero. The tassels may be represented as knotted cords. An exception is made for Chinese bishops, who avoid using a green hat in their arms since "to wear a green hat" is a Chinese idiom for cuckoldry. Rather than green, these bishops use a variety of colors