Castro de Castromaior

"The Castro de Castromaior, located in the town of Castromaior, in the municipality of Portomarín in the Province of Lugo, . . .

is one of the most important archaeological sites in the northwest of the Iberian Peninsula. 

This settlement, developed in the Iron Age, was inhabited between the 4th and 1st centuries AD by various populations . . .

until its abandonment with the arrival of the Romans." -- Camino de Santiago Francés