St. Jørgensbjerg church is the oldest preserved stone building in Denmark. Built of travertine circa 1100, it may have been inspired by the Roskilde's cathedral predecessor, a travertine church from 1080, built by Bishop Svend Nordmand. The bricked-up north door of the church may also stem from its predecessor from circa 1040, which was investigated in excavations undertaken in 1953-54. If it does, the north door is Denmark's oldest piece of medieval architecture.
The slender billets at the corners and in the middle of the nave are quite unique. Such billets are only found in wooden churches, hence its name 'a fossilized wooden church'. There are many interesting details in the interior of the church. A model of a medieval merchant vessel, a so-called 'kogge', has been engraved in the wall.
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.