The Basilica della Santissima Trinità di Saccargia is a church in the comune of Codrongianos, northern Sardinia. It is the most important Romanesque site in the island. The construction is entirely in local stone (black basalt and white limestone), with a typical appearance of Tuscan Romanesque style.
The church was finished in 1116 over the ruins of a pre-existing monastery, and consecrated on October 5 of the same year. Its construction was ordered by the giudice (judge) of Torres. It was entrusted to Camaldolese monks who here founded an abbey. It was later enlarged in Pisane style, including the addition of the tall bell tower. The portico on the façade is also probably a late addition, and is attributed to workers from Lucca.
The church was abandoned in the 16th century, until it was restored and reopened in the early 20th century.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.