The military culture in Galicia covers a long period of time from the Iron Age (S.VI B.C.) to the sixth century A.D. In the words of Florentino Cuevillas the Castros would be "fortified enclosures ou oval circular ou fitted with several concentric walls, preceded do seu correspondente foxo, and located, do not give them máis cume Outeiros and mountains"
Since ancient times it was held that the inhabitants of the forts were the Celts, people from the Caspian and Caucasus, and brought the technique of iron, this myth of celtismo who found great defenders in Murguia and historians his generation. Today we no longer maintain the exclusivity of the population Celtic hill fort, and would be considered as the result of a racial mixture between the indigenous element and newcomers Celts. In Marin we Castros in A RISE (Sete Espadas - Mogor), Castelo Barbudo (Pardavila-San Xulián), the Castelo (Ardan), and possible asentamentos of castros in Pedreiras (or field), Penizas (Currás), Sobareiro (Loire) and Castro (Seixo).
Of these highlight the A RISE, which is considered the best preserved despite the multiple attacks he suffered. This is a fairly Romanized military settlement and could place between the I and IV centuries D.C., with an economy based on a strong agricultural and livestock based supplemented by hunting, fishing and shellfishing economy. At the end of s. XIX still retained parts of its double walled enclosure, and at the beginning of s. XX were still standing some of circular homes. The wealth of material was such that practically did not need or dig for remains.
Many of these remains are now in the Provincial Museum of Pontevedra, but many others, the result of the furtive and uncontrolled excavations, never heard.