The SS. Trinità di Saccargia (Holy Trinity of Saccargia) church is one of the most charming examples of the Romanesque-Pisan style in Sardinia. Located in the municipality of Codrongianos approximately ten kilometres from Sassari on national highway no. 597 to Olbia, it rises on a small hillock. Saccargia means “s'acca argia" (brindled cow). This name is tied to a legend according to which a cow habitually kneeled in a praying pose and offered its milk to the brothers of a near-by convent.
Established in 1112 - according to that reported by an archiepiscopal's deed - the small church located in Saccargia was donated to Camaldolite monks. The original structure, of which consistent ruins remain, was added to the Camaldolite monastery.  Its consecration took place in 1116 with exceptional grandiosity and the presence of the most important ecclesiastic authorities on the island. Subsequently, Pisan workers completed the nave and the façade by adding two essential elements: the portico and the bell tower.
During the three centuries of its history as a Camaldolite abbey (from the XII to the XIV centuries), the Saccargia basilica always had an influential position and its abbots and priors had superiority over other monasteries in Sardinia.  After 1384, the Camaldolite monks abandoned the abbey that was then entrusted to a commendatory abbot. In 1820, the abbey's estate income was assigned to the University of Sassari. Now, only ruins remain of the monastery; the church underwent restoration in 1894, which succeeded in saving and keeping this splendid medieval artistic treasure.

Artistic outlines:
The church, realized in dark and white limestone basaltic lava ashlars, has a portico with three arches resting on columns in the middle and on pillars on the corners. The façade at the back has three levels: the lower one has a portal with a two-coloured supporting arch; the central one has five small arches supported by reddish stone columns with carved capitals; the upper level has five sloping arches that follow the slope of the roof with a small central opening in the form of a cross.   The austere interior has a single nave with two apsidal chapels that flank a larger one forming the transept, a covering supported by thirty-six visible wooden trusses and a floor with grey basaltic stones. The great frescoed sky in the apse in the conch represents Christ surrounded by angels, in the intermediate area are twelve figures of Doctors of the Church and a praying Madonna and in the lower one, there are six scenes of the life and passion of Christ.