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
Albanian heraldry of the National History Museum, Tirana) and it is produced according to all heraldry regulations of the time. It is carved from the local master Dhimitër Spada and it is accompanied by a writing in 3 languages: Latin, Greek and Slavic, showing that the herald of this noble Albanian family was a very well known artist. The seal is the highest level of artistic development in heraldry because new elements were introduced according to a defined regulation. The unification of these decorative-artistic elements was the seal. In Medieval times, noble families also had their flags similar to the heraldry emblems.