The Kelasurskaia Tower was part of the great Abkhazian wall, fortifications ordered by Emperor Justinian in the 6th century to protect the Black Sea port of Sukhum (currently the capital of the breakaway republic of Abkhazia) from invaders from the Northern Caucasus. Construction continued on the wall til the 17th century, and much of it still remains.
Philosophical Context: Kaffa
A Genoese fortress, on the northern Black Sea littoral. The complex of fortifications in this area dates 6th-16th centuries.