Ikalto monastery was founded by Saint Zenon, one of the 13 Syrian Fathers, in the late 6th century. It was known as one of the most significant cultural-scholastic centres of Georgia. An academy was founded at the monastery during king David the Builder by Arsen Ikaltoeli (Ikaltoeli meaning from Ikalto) in the early 12th century. The Academy of Ikalto trained its students in theology, rhetoric, astronomy, philosophy, geography, geometry chanting but also more practical skills such as pottery making, metal work, viticulture and wine making and pharmacology. According to a legend the famous 12th century Georgian poet Shota Rustaveli studied there.
There are three churches on the monastery grounds – Khvtaeba, Kvelatsminda and Sameba. The main church, Khvtaeba (Holy Spirit), was built in the 8th–9th century on the site of an older church (in which Saint Zenon had been buried). In 1616 the Persian invaders led by Shah Abbas I set the Ikalto Academy on fire and it ceased to exist.
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.