The Barbican, the 15th century bastion with a circular floor plan used to belong to the wall system of the Bishop's Castle. Its construction is linked to the visit of General Pál Kinizsi, who came to the town in 1498. In the shadow of the Turkish threat the defence systems of castles and towns were strengthened all around the South. The Gothic-style gate tower was built in the 15th century at the western corner of the high castle wall. The Barbican is a round gate tower sitting on a narrow column. Its back gate served a specific purpose: it enabled the defenders to attack the attacking enemy getting in the gate from the side. The Barbican is surrounded with the remains of the castle ditch and you can walk up to the entrance on the old drawbridge. The pulleys of the drawbridge are still displayed inside.
There is a fantastic view opening towards the town from the top of the bastion. You can walk along the machicolation (the wooden walkway) on the top of the Barbican.
After defence structures became obsolete during the 18th-19th century, similarly to other parts of the town, houses were built around the castle wall. The buildings that were built along the castle walls were demolished in the 1960s making the old Barbican as well as other parts of the wall free and visible again.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.