The royal crown in gules, i.e. red, enclosed in a golden ring set with precious stones, made up of eight acanthus leaf fleurons, out of which five are visible.

Each leaf is set with pearls, and five tiaras are born from them to converge in a globe of azure, with the semi-meridian and the equator in gold, topped by a golden cross.

The historians Faustino Menéndez-Pidal and Juan José Sánchez Badiola find the first references to it in two rolls of arms from the late 13th century – in Segar's Roll and in the Armorial du Hérault Vermandois – which attribute the coat of arms to the king of Galicia, although by that time it no longer existed as a separate title.

The most ancient remaining representations of the coat of arms in Galician civil architecture are also from the 15th century depicted in the Royal hospital of Santiago de Compostela, Betanzos town hall, Corunna walls, Lugo Cathedral's organ, Noia Church's tower, Moscosos residence in Laxe.

Joseph de Avilés, in "Heroic science", defined the coat of arms: "The kingdom of Galicia in Spain includes a field of azure with scattered crosses and a big golden cup and chalice".