St. Jadwiga's Church in Brzeg is a Gothic castle church. The Gothic brick-built chapel, adjoined to the south-western portion of Brzeg Castle was built in the former location of a collegiate church built between 1368 and 1369. In 1741, the chapel was destroyed due to Prussian bombardment, with only the presbytery having had survived. After its reconstruction in 1783-1784, the chapel served as the mausoleum for the Silesian Piasts (after 1945, 22 sarcophagi were found in the crypt). The chapel suffered damage during World War II, and was reconsecrated as a church in 1989.
Presently, the sarcophagi are located in the adjoined Silesian Piasts Brzeg Castle Museum.
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.