The Archangel Michael's Cathedral is a Belarusian orthodox cathedral church of the Eparchy of Turov located in Mozyr. The church was built in 18th century as a Catholic church of Franciscan monastery in late baroque style in the form of two-towered three-nave basilica.
In 1745 Marszałek Kazimierz Oskierka start the building of new stone Franciscan (in Poland called 'Bernardine') monastery with a big church in its center.
After partitions of Poland Mozyr was in Russian Empire. After January Uprising (1863–64) quite all catholic monasteries and many churches in modern Belarus and Ukraine were closed, so in 1864 Mozyr franciscan church was transferred to the orthodox church.
From 1937 to 1941 the cathedral was turned into a prison of the NKVD of Polesie region.
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.