The Monastery of Roussanou was founded in the middle of the 16th century. Compared to other rocks where monasteries were built, the one of Roussanou has a lower elevation, which makes it more accessible. The monastery was initially founded by monks and it suffered severe damage during World War II. It became a convent in 1988. The beautiful wall-paintings of the Catholicon were executed in 1560, when the priest-monk Arsenios was the abbot of the monastery. The unknown hagiographer seems to have been a very skilful artist and successfully follows the Cretan School style.
References:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.