Jvari is a sixth century Georgian Orthodox monastery near Mtskheta. Along with other historic structures of Mtskheta, it is listed as a World Heritage site by UNESCO. It stands on the rocky mountaintop at the confluence of the Mtkvari and Aragvi rivers, overlooking the town of Mtskheta.
According to traditional accounts, on this location in the early 4th century Saint Nino, a female evangelist credited with converting King Mirian III of Iberia to Christianity, erected a large wooden cross on the site of a pagan temple. A small church was erected over the remnants of the wooden cross in circa 545 AD. The present building is generally believed to have been built between 590 and 605 by Erismtavari Stepanoz I.
The importance of Jvari complex increased over time and attracted many pilgrims. In the late Middle Ages, the complex was fortified by a stone wall and gate, remnants of which still survive. During the Soviet period, the church was preserved as a national monument, but access was rendered difficult by tight security at a nearby military base. After the independence of Georgia, the building was restored to active religious use.
The Jvari church is an early example of a four-apsed church with four niches. Between the four apses are three-quarter cylindrical niches which are open to the central space, and the transition from the square central bay to the base of the dome's drum is effected through three rows of squinches.The Jvari church had a great impact on the further development of Georgian architecture and served as a model for many other churches.
Varied bas-relief sculptures with Hellenistic and Sasanian influences decorate its external façades, some of which are accompanied by explanatory inscriptions in Georgian Asomtavruli script. The entrance tympanumon the southern façade is adorned with a relief of the Glorification of the Cross, the same façade also shows an Ascension of Christ.
Erosion is playing its part to deteriorate the monastery, with its stone blocks being degraded by wind and acidic rain.
Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.