Santa Maria del Naranco. Monuments of Oviedo and the Kingdom of the Asturias. The Kingdom of Asturias remained the only Christian region of Spain in the 9th century. It developed its own style of Pre-Romanesque art and architecture that is displayed in various churches and other monuments. The original entry titled "Churches of the Kingdom of the Asturias" and was extended to include other monuments such as La Foncalada.