Santianes de Pravia Monument · Pravia, Avilés, Asturias San Juan Evangelista is the oldest surviving building of the Asturian monarchy: it was raised by King Silo and Queen Adosinda in the 8th century, when Pravia was the capital of the kingdom, and it had a labyrinth inscription with the legend Silo princeps fecit. Photo: Jordi.mimo (CC BY-SA 4.0) What to see and do in Pravia