The first church in Bro was built during the 12th century in Romanescue style. The next church was completed in 1236 and it represented the Gothic style. In the reconstruction around 1300 the nave was demolished and replaced with the present one. In the Middle Ages Bro church was a destination for pilgrimages, because very important relic, an “original” piece of Jesus Christ’s cross was kept there. The pilgrimage tradition has been continued also after Reformation.
The baptismal font and Holy Rood date from the 13th century, wall paintings from 14th -15th and 18th centuries. Partly medieval choir stall, reredos was made in 1688 and pulpit 1723.
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.