Tongeren Béguinage, founded in 1257 is listed as a UNESCO World Heritage Site since 1998. Its enclosure wall was destroyed in the 19th century: it separated the beguinage from the rest of the city and thus guaranteed peace and quiet for the small religion-inspired community. In the 17th century the beguinage counted some 300 beguines; it was also able to survive the 1677 fire that destroyed most of the city. In the center of the béguinage stands the Saint Catherine Church, built in 1294 and one of the oldest churches in the entire city.
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.