The Santa Eulàlia church in Alaior is built atop a hill. The village formed around it from the 14th century onwards. There was apparently an earlier church, of which the vaulted arches of the main facade and a part of the side wall may remain. The parish was founded in the early 14th century, and is mentioned as early as the Pariatge of 1301 signed by James II of Majorca. The current building was erected between approximately 1630 and 1690. The church has a number of Baroque elements, although it features are of a Renaissance church, with a clearly Mannerist influence. It is one of the most spacious churches on the island. The layout comprises a single nave with an arched barrel vault and six side chapels, interconnected by an open passage built in 1735.
The parish church was also required to serve as a shelter for the village population in the event of invasion, hence its solid structure and the great size of the nave. The main facade is one of the most original on the island. The lower body contains simply the main gateway, and is reached via a ramp and stairway. The upper body, which is set back to leave a passageway connecting the two towers at each end, features a rose window. During the Civil War the church was sacked, and the organ, altars, paintings and Baroque reredoses of the main altar and other ornamental elements destroyed. During the current restoration, the most significant ever performed, the original masonry of unclad marès sandstone has been reinstated.
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.