Their emblems or heraldic devices, seen at the bottom of the coat of arms, were a yoke and a sheaf of arrows. Y and F are the initials of Ysabel (spelling at the time) and Fernando. A double yoke is worn by a team of oxen, emphasizing the couple's cooperation. Isabella's emblem of arrows showed the armed power of the crown, a warning to Castilians not acknowledging the reach of royal authority or that greatest of royal functions, the right to mete out justice by force of violence. The iconography of the royal crest was widely reproduced and was found on various works of art. These badges were later used by the fascist Spanish political party Falange, which claimed to represent the inherited glory and the ideals of the Catholic Monarchs.