Hünenberg Castle was built in the 12th century and mentioned first time in 1173. At the Battle of Sempach in 1386 Hünenberg fought on the side of Habsburg family and the castle was destroyed after the defeat. During the following three decades the Hünenberg family also lost their power and reputation. In 1416, Rudolf von Hünenberg sold the ruined castle and its rights to the Bütler brothers. The keep was still standing into the 19th century.
Narikala is an ancient fortress overlooking Tbilisi, the capital of Georgia, and the Kura River. The fortress consists of two walled sections on a steep hill between the sulphur baths and the botanical gardens of Tbilisi. On the lower court there is the recently restored St Nicholas church. Newly built in 1996–1997, it replaces the original 13th-century church that was destroyed in a fire. The new church is of 'prescribed cross' type, having doors on three sides. The internal part of the church is decorated with the frescos showing scenes both from the Bible and history of Georgia.
The fortress was established in the 4th century and it was a Persian citadel. It was considerably expanded by the Umayyads in the 7th century and later, by king David the Builder (1089–1125). Most of extant fortifications date from the 16th and 17th centuries. In 1827, parts of the fortress were damaged by an earthquake and demolished.