Fagerborg Church was completed in 1903 and has 480 seats. The church is in neo-Gothic style with elements of Jugend style and built in granite from Skjeberg. The church was redecorated inside for the fiftieth anniversary in 1953. On this occasion, it was also done new chandeliers by architect Harald Hille.
The pulpit and altar are both designed by the church architect. Stained glass is made of imperial and royal court stained glass artist Max Roth from the studio Miksa Roth in Budapest, Hungary, with Art Nouveau features. Pulpit is in American Oregon pine, also Art Nouveau style. It is performed by carvings Borgersen drawing by Schytte-Berg. The font is in white marble, has an octagonal base and is in neo-Romanesque style. The altarpiece was designed by the architect and executed by sculptor Jo Visdalen. The altarpiece has over the years undergone a number of changes.
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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.