Kumurdo Cathedral is situated on Javakheti Plateau, 12 km southwest from Akhalkalaki. According to the inscriptions on the walls, written with the ancient Georgian writing of Asomtavruli, the Kumurdo Cathedral was built by Ioane the Bishop during the reign of king of the Abkhazians Leon III in 964. During the Middle Ages, Kumurdo was an important cultural, educational and religious center. The cathedral was restored twice (1930; 1970–1980), but it stands without a dome.
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.