You will stand in awe of the monumental grandeur that almost a thousand years of life have given to this gem of Romanesque-Pisan architecture revisited in a Gothic and Baroque touch. The Basilica di Nostra Signora dominates a vast plain in the area of Tergu, a small town near Anglona. It emerges from verdant nature in all its polychromatic glory, with colours from slabs of purple-red trachyte and decorations made with white calcareous stone. Sancta Maria de Therco was probably constructed between 1065 and 1082, perhaps at the behest of the local sovereign Torres Mariano I, the same man who had the Basilica of the Santissima Trinità di Saccargia built, which bears evident similarity. The church was expanded in the following century and became a Benedictine abbey and, together with the monastery, whose ruins you can see next to it, was the seat of the Cassinese priory. For centuries it has been the starting point of the heartfelt, 11 km long Lunissanti procession to Castelsardo that begins at dawn and returns, torches ablaze, after sundown to mark the beginning of the celebrations, rites and rituals of Holy Week.