Anakopia Fortress (Georgian: ანაკოფია, romanized: anak'opia) is an ancient military citadel in New Athos (as it is currently known) in the disputed Abkhazia, Georgia located some 22 km (14 miles) by road along the coast from Sukhumi.
[2] The walls, up to 60 centimeters (~2 feet) thick, are constructed of largely tightly assembled and carefully hewn limestone blocks.
At the centre is a Roman style tower, four storeys high, with excellent views in all directions across the surrounding landscape and, to the south-west of the fortress, the Black Sea.
The stone altar from it survives to this day (2014), along with some frescoes featuring a cross and some fishes, a religious symbol frequently used by early Christians in and around the Eastern Roman empire.
[1] During the eighth century, Anakopia found itself near the moving frontier that separated Byzantine Christendom from the Umayyad Caliphate, and in 736/737 Abū ʿAbd Al-Malik Marwān ibn Muḥammad, the future Marwan II, appeared outside the walls with a force of 60,000 men and laid siege to what was by now the capital of the Abkhazian Kingdom.