Eidsberg church, also called as Østfold Cathedral, was built in the late 1200s, but burned in 1440. The church was rebuilt, and in 1880-81 it was extended and restored to its present appearance. The wall is derived in part from the old medieval church. Findings suggest an early church about the year 1000, followed by a Romanesque church in 1100-tallet. Alteret the current church is from 1651, the pulpit from 1662. The baptismal font made of soapstone is from the Middle Ages, and two sculptures - Adam and Eve from the 1600s.
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.