The largest citânia in Portugal by excavated area. Fifteen hectares of pre-Roman city in the heart of Entre-Douro-e-Minho — all evidence suggests it was chosen, in the aftermath of the Roman campaigns of the 2nd century BCE, as the capital of the Calaici peoples settled on the right bank of the Douro.

What sets Sanfins apart from other citânias is not only its scale. It is the castro bathhouse — still fed today by an active natural spring — with its decorated Pedra Formosa, a monolithic stone dividing the steam room from the cold water atrium. The pedra formosa has small notches for placing wet hands, allowing the body to be gripped firmly and slid through the small opening. The ritual bath was not hygiene. It was passage. Transformation before combat, before council, before whatever required becoming someone else.

In the reconstructed family nucleus, a triskelion carved in stone is clearly visible — the triple spiral that organises time and cosmos in castro symbolism. Nearby inscriptions at the Penedo das Ninfas reveal the names of the Fidueneas' deities — including Cosunea, associated with war, and Turiaco, god of prosperity and abundance.

The spring still flows. The water that once fed the ritual still exists. That is not archaeology. That is continuity.