The Basilica of St. Lawrence was a cathedral church and is now a minor basilica. It belongs to Enns-Lorch deanery in the Diocese of Linz. The church is a listed building.
The basilica rises above the remains of their Roman predecessors, which were discovered during archaeological excavations between 1960 and 1966. The oldest building - a Roman noble house - dating from the 2nd century AD. It was also built an early Christian church. There were several renovations and expansions until 1300, the existing church was built in Gothic style. At the end of archaeological research, the church was renovated and was one of the first churches in the country, whose design was affected by the spirit of the Second Vatican Council (1962–1965).
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.