The oldest known church on the site was built in the 13th century. The medieval church was demolished in 1854 and replaced with a new one designed by Sven Sjöholm and J. A. Hawerman. This church was destroyed by lightning in 1943. The present church was built in 1946-1947.
The medieval font and altarpiece (painted in the mid-19th century) have survived. The other interior date from 1940s.
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.