The Katskhi Monastery of Nativity of the Savior was built at the behest of the Baguashi family in the period of 988–1014. The church building is noted for a hexagonal design and rich ornamentation. Closed down by the Soviet government in 1924, the monastery was revived in 1990 and is now operated by the Eparchy of Sachkhere and Chiatura of the Georgian Orthodox Church.
The Katskhi monastery is a octagonal building of more complex design than other similar polygonal Georgian monuments. The exterior of the church features three gradually narrowing cylindrical levels formed by the faceted gallery, the main body of the church, and the drum of the dome.
The six apses are inscribed into the outer polyhedron and surrounded by an ambulatory from all sides. A single spacious interior compartment around the subdome bay includes radially oriented semi-circular apses. One of these, the altar apse, projects outward prominently due to its large bema. The drum of the dome is also faceted. Each facet of the main body of the church as well as that of the dome and gallery terminate in a pediment with three lines of polygonal cornices.
The building was richly ornated, but the decoration of two upper tiers was lost in the process of the 1854 restoration. Of note is a large composition in relief at the southern vestibule of the gallery, the Exaltation of the Holy Cross, featuring a cross supported by four angels.
The church is surrounded by a pentagonal wall, which contains a free-standing bell tower in its eastern corner. These structures are later additions, probably from the 17th or 18th century.
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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.