The first stone church in Hörsne was built in Romanesque style during the 12th century. The oldest part of present church is the tower dating from the first half of the 13th century. The rest of the Romanesque church was eventually pulled down and replaced with a Gothic main building. Thus the choir and the vestry are from the end of the 13th century, while the nave was built during the early 14th century. When the nave was constructed, the choir was also modestly 'modernised' by the insertion of the presently visible eastern window. The church retains much of its medieval character.
The church has two remarkably sculptured portals. The choir portal display carved foliage and a few figures: two fish and a lion. The main portal is crowned by a sculpture of Saint Michael wielding a club and carrying a shield, sitting astride the wimperg. Underneath, the capitals are profusely sculpted with scenes from the apocalypse. Other capitals are decorated with foliage ornamentation. Both of the portals may have been made by the so-called Master Egypticus, a locally active anonymous master stone sculptor, and his workshop.
Some of the church windows display original stained glass paintings, displaying architectural motifs, foliage and a depiction of Bartholomew the Apostle. The church's altarpiece is a curious mix between Gothic wooden sculptures, evidently stemming from an earlier (14th century) altarpiece, incorporated into a Baroque altar from 1701. The church also has a notable triumphal cross, where the figure of Jesus is 15th century but the cross itself from the 17th. The pews, the pulpit and baptismal font are all from the 17th and 18th centuries.
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.