The cultural heritage and layout of Oviedo still faithfully reflect its original urban plan. The medieval part of town, whose thirteenth century walls are still largely intact, consists of three streets running north-south and a principal route running from east to west. In the north-east section of the historic zone is the vast episcopal district with the cathedral and adjacent buildings, and the civil district reaches towards the south. Most of the structures in the old town were built after the fire, largely in the sixteenth and seventeenth centuries.
There are, however, a few religious buildings that date back to the early Middle Ages, such as the church known as Camara Santa de San Salvador de Oviedo and the San Julian de los Prados Basilica, which both bear witness to Oviedo’s heyday in the eleventh century. In addition, archaeological digs have revealed a well called La Foncalada dating back to the same era. The latter is a fascinating example of an effective hydraulic system based on even older technology. Two other buildings in Oviedo are already among the World Heritage listings: the Church of Santa Maria del Naranco and the Church of San Miguel de Lillo. Built between 842 and 850, these two architectural masterpieces are unique examples of the pre-Roman Asturian building style of the early Middle Ages.
The later religious buildings, such as the Gothic San Salvador Cathedral from the fifteenth century, and the Roman San Vicente Monastery, suggest the persistence of the Christian church throughout the Middle Ages. First and foremost, Ovideo’s monuments are priceless relics of the Kingdom of Asturias, which existed so long ago that few of its buildings remain. But in addition, the town in its entirety serves as a illustration of how Christianity has persisted in northern Spain ever since the late Middle Ages.