Tergu is a farming community of less than 600 consisting of a small town and some isolated houses scattered across a fertile basin. An independent municipality since 1980, it used to be a hamlet of the municipality of Castelsardo, from which it is 10 kilometres away. On Monday before Easter, confraternity members and the faithful walk the road linking Tergu and the capital of Anglona in one of the most fascinating rituals of the Holy Week of Castelsardo. The procession of Lunissanti departs at dawn from the Church of Santa Maria degli Angeli in Castelsardo, passes by Lu Bagnu and finishes at a small rise on the outskirts of town, where the Church of Nostra Signora di Tergu is located. The evening return is illuminated by a long line of torches. The church was built in the second half of the 11th century by the ruling family of the Giudicato of Torres. It was expanded in the following century when it became a Benedictine Abbey (it is sited in the Montecassino documents from 1122 onwards). Along with the monastery, of which only ruins remain, it was the seat of the Cassinese Congregation.