Church of Santa Eulalia of the Monastery of Arnoso was originally founded in the 7th century on the initiative of San Frutuoso, Bishop of Dume and Braga. It was destroyed by the Moors in the 11th century. It was later rebuilt by King García II of Galicia.
It is a simple church in early Romanesque style with a nave, a barrel vault and a rectangular apse with blind arches. The wooden portal consist of round arches and a tympanum with a cross pattée. These round arches are profusely decorated with geometric, intertwined and zoomorphic elements.
Inside the church there are a few sixteenth century frescoes with episodes from the life of Our Lady. The two crosses on top of the roof show some similarities with Celtic crosses.
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.