The example of the work of Archbishop Antonio Agustín (1516-1587) «Diálogos de las armas y linajes de la nobleza de España» scholars consider the ratio of the XVI century. to the armory. Сoat of arms for Agustin - a visual signs, banners equal marks the legions and cohorts in ancient times. Agustin different position critical and historical approach to the question of arms of the Gothic kings, the origin of the royal arms of Castile. Agustin said the variability of contemporary Spanish heraldic practice. Agustin product indicates the level of formal knowledge of heraldry and heraldic in Spain in the second. floor. XVI century. His text shows that in Spain in the XVI century. heraldic terminology was not stable. Agustin brings to the field of heraldry organizing principle that allows to systematize the material. Classification proposed by Agustin, talk about what he perceived as a historic heraldry and changing phenomenon, and came very close to its real history and the early genesis. Agustin first who understood Spanish heraldry XVI century. heraldry as a single Iberian Peninsula, including Portugal.