The Reichenstein castle was built in 12th century at the northern end of the Hollmuth hill. In the 14th century it was acquired by the Palatinate but only one century later it was abandoned. On a 17th century engraving by Merian the castle is depicted as a ruin. Today, only some wall fragments are left. The castle complex has an almost rectangular grouned plan; it is saperated from the hill by a moat. The terracing was done at the beginning of the 20th century.References:
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.