The structure of the present St Mary's Church is thought to originate from the 13th century, although because the churchyard is round in shape, it is likely that there had been an earlier church on the site. Additions and modifications were made during the following centuries. Dating from the pre-Reformation period are the east window, the roof and the rood screen. The bellcote is dated 1688. The church was restored in 1857. the restoration included removal of the west gallery. Encaustic tiles were laid in the sanctuary in 1907.
The floor of the nave is flagged, the chancel has a wood-block floor, and the sanctuary has encaustic tiles. The outstanding feature of the interior is the rood screen which has retained its loft. It is finely carved with Perpendicular features. The font is dated 1665. The rest of the furniture dates from the 19th century. This includes a large, carved, octagonal pulpit, an oak altar, and an octagonal font.
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.