The Church of Santo André is a Romanesque and Baroque era church located in the civil parish of Fiães, municipality of Melgaço. Originally a Roman-Cistercian monastery, it was remodeled during the 17th and early 18th century in the Baroque style, but still exemplifies many of the characteristics of the early building (typifying the Galician Cistercian monasteries and Minhota churches of the time). The beginning of 17th century remodeling began with images of the patron saints and coat-of-arms on the frontispiece, but later extended into the lateral altar (Mannerist) and the chancel retable (Baroque).
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.