St. Nicholas Church (St. Nikolai Kirche) construction was started around 1230, making the building the second oldest church on the island. The size of the church was increased in 1470 and in 1508 the tower of the church was built.
There is a bronze font in the church which dates from 1391. It is not certain how it arrived at the church, but the casting carried an inscription which records that the font was given by Korp Benno the Bishop of Arosia. Another significant item of the 14th century is a polptych which has fourteen panels today but it is believed to have lost further panels. In addition there is another stone font that was rediscovered when nearby buildings were being built. It has since had a base added, and small restorations have also been made.
Amongst the church's artefacts on display is a large chest that was used for storing the parishioners contributions. After each service the collection bag would be emptied into the chest, but it would only be opened once a year. When it was opened then the funds would be distributed to those in need.
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.