Castello di Pedres

On a granite ridge south of Olbia, the ruined castle of Pedres has watched over the coast since the age of the giudicato of Gallura. Its keep still crowns the hill.

Why it matters

Castello di Pedres is one of Olbia’s defining medieval monuments, alongside the basilica of San Simplicio. It is the rare fortified site in north-east Sardinia that speaks of the giudicato period, when the island was divided into autonomous judicates and the Gallura coast needed watching. What survives is fragmentary yet legible: a squared keep, the ghost of a double wall circuit and a summit panorama that explains why anyone would bother to fortify this particular hill. The site also layers eras together, because a Second World War structure stands on the same crest as the medieval masonry.

What to notice

Start with the mastio, the quadrangular keep: two of its original four floors remain, rising roughly ten metres, with an underground cistern beneath. Nearby you can pick out the corner formed by two sides of a second cistern and the traces of two rectangular rooms. The castle was ringed by a double curtain wall, an outer one around a fortified space probably used by garrisons, an inner one shielding the keep. Halfway up the ascent path, the stump of a small observation tower contemporary with the castle marks the outer approach. At the summit, a Second World War building, variously described as an anti-aircraft position, casemate or store, sits a few steps from masonry laid six centuries earlier. The view runs over Olbia, its gulf and the coast road.

Context and history

The castle was probably built in the thirteenth century, when the Visconti of Pisa held sway over the giudicato of Gallura, and it served that judicate's defence. Around the mid-fourteenth century it was entrusted to the Hospitaller friars of San Giovanni di Gerusalemme, and later it passed to the Aragonese before being abandoned from the fifteenth century onwards. Fourteenth-century sources record a village called Villa Pedresa a few hundred metres downhill to the south; it has vanished without trace. About three hundred metres west stands another reason to linger: the Giants' Tomb of su Mont'e s'Abe, an Early Bronze Age allée couverte of roughly 1800 to 1600 BC later remodelled into a Giants' Tomb with semicircular exedra, corridor and burial chamber.