Castro of Santa Trega

The Castro of Santa Trega is a Castro-Roman settlement on Mount Santa Trega in A Guarda, Galicia, Spain, at 341 m above sea level overlooking the Mino River mouth. Covering about 20 hectares, it housed 3,000-5,000 inhabitants at its peak between 100 BC and 100 AD, making it one of the largest castros in northwestern Iberia. Documented origins trace to the 4th century BC. Excavations began in 1914 under the Pro-Monte Society; Cayetano de Mergelina led major campaigns from 1928-1933. Stone carvings feature geometric spirals, triskelions, and Celtic rose motifs. Declared a National Historical and Artistic Monument in 1931, the MASAT museum displays ceramics, Roman coins, and the iconic "Cabezon" stone head.