Iglesia de San Salvador is a Romanesque-style church located in the town of Fuentes, Villaviciosa. The church of San Salvador is documented in 1021 (via an inscription) as due to the patronate of Diego Perez, and consecrated by Bishop Adaganeo I. The church appears to have been built in the 12th-century. The diocese of Villaviciosa is mentioned in 1385 by the bishop of Oviedo, Gutierre de Toledo. The temple is mentioned in 1625 in documents of the Monastery of San Pelayo of Oviedo. In the 18th century it was a parish church. The church was declared an Artistic Historical Monument in 1931. During the Spanish civil war the church was burned, it was reconstructed in its prior form in 1950.
A processional crucifix, a bejeweled silver cross, with gilded wood, semiprecious stones and a Roman cameo from the church, one of the pinnacles of goldsmithery in medieval Asturian, were stolen in 1898 and sold to French and then American private collectors. In 1917 J. Pierpont Morgan donated it to the Metropolitan Museum in New York, where it now is exhibited.
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.