The original Romanesque Linnerup Church is changed much in recent times. Only the choir has been preserved, its outer walls were in 1880 walled with small bricks. A Romanesque window is still seen as a niche in the eastern wall. The dilapidated nave was broken down and rebuilt in 1866. The tower was built at the same time.
In the choir is built a late Gothic cross vault, the nave has a boarded tagstol (roof stool) (changed in 1893). The choir vault has late Gothic frescoes. The altarpiece is a painting from 1893. Romanesque granite font with a rough rope winding along the edge. A pulpit in Renaissance style dates from c. 1600 with a new partiel decoration.
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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.