Gergeti Trinity Church is situated on the right bank of the river Chkheri (the left tributary of the river Terek), at an elevation of 2170 meters, under Mount Kazbegi.
The Gergeti Trinity Church was built in the 14th century, and is the only cross-cupola church in Khevi province. The separate belltower dates from the same period as the church itself. Its isolated location on top of a steep mountain surrounded by the vastness of nature has made it a symbol for Georgia. The 18th century Georgian author Vakhushti Batonishvili wrote that in times of danger, precious relics from Mtskheta, including Saint Nino's Cross were brought here for safekeeping. During the Soviet era, all religious services were prohibited, but the church remained a popular tourist destination. The church is now an active establishment of the Georgian Orthodox and Apostolic Church
The church is a popular waypoint for trekkers in the area, and can be reached by a steep 1 1/2 hour climb up the mountain, or around 30 minutes by jeep up a rough mountain trail.
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.