Ermita de Santa Cruz
Cangas de Onís was the first capital of the Asturian kingdom. The church of the Holy Cross (Santa Cruz), built upon a dolmen in 737 by the king Favila, in a place where there were already remnants of a previous church, according to a foundational inscription, today disappeared, is the most ancient building from this period that we know. Destroyed on several occasions, the place has now a hermitage built in the 20th century, but the dolmen still stands.
For more information Pre-Románico: cántabro-astur