Church of Santiago de Peñalba Monument · Ponferrada, El Bierzo, León A jewel of Mozarabic art raised in the first half of the 10th century by Abbot Salomón under the reign of Ramiro II, in the heart of the Oza valley. Declared a monument on 3 June 1931, it is the great landmark of the so-called Leonese Thebaid. Photo: Fogar Mozárabe (CC BY-SA 4.0) What to see and do in Ponferrada